Trigonometric Integrals

Integrating trigonometric and inverse-trigonometric functions.

← All learning targets

Trigonometric Integrals

23 questions

AP Learning Target(s): LT 8: Finding Antiderivatives and Indefinite Integrals: Basic Rules and Notation

Antiderivative of a Sine Function

I. $$\int 7\sin(x) dx = -7\cos(x) + C$$

II. $$\int 7\sin(x) dx = 7\cos(x) + C$$

III. $$\int 7\sin(x) dx = -\cos(x) + C$$

Which of the statements above is true?

  1. A.

    III only

  2. B.

    II only

  3. C.

    I only

  4. D.

    II and III

Correct answer: C
Antiderivative of a Trigonometric Function

Which of the following is an antiderivative of $$3\sec^2 x + 2$$?

  1. A.

    $$3\sec x + 2x$$

  2. B.

    $$\sec^3 x + 2x$$

  3. C.

    $$3\tan x$$

  4. D.

    $$3\tan x + 2x$$

Correct answer: D
Antiderivative of a Trigonometric Product

Which of the following is an antiderivative of the function $$f(x) = \sin(2x)\cos(3x)$$?

  1. A.

    $$-\frac{1}{10}\cos(5x) + \frac{1}{2}\cos(x) + C$$

  2. B.

    $$\frac{1}{2}\sin(5x) - \frac{1}{2}\sin(x) + C$$

  3. C.

    $$-\frac{1}{5}\cos(5x) + \frac{1}{4}\cos(x) + C$$

  4. D.

    $$\frac{1}{2}\cos(5x) - \frac{1}{2}\cos(x) + C$$

Correct answer: A
Antiderivative of Cosine

Which of the following is an example of correctly finding the antiderivative of $$\cos(x)$$?

  1. A.

    Antiderivative = $$-\cos(x)+C$$

  2. B.

    Antiderivative = $$\sin(x)+C$$

  3. C.

    Antiderivative = $$-\sin(x)+C$$

  4. D.

    Antiderivative = $$\cos(x)+C$$

Correct answer: B
Definite Integral of a Sine Function

$$\displaystyle\int_{0}^{\pi/2} \sin(2x) dx = $$

  1. A.

    $$0$$

  2. B.

    $$2$$

  3. C.

    $$1$$

  4. D.

    $$\displaystyle\frac{1}{2}$$

Correct answer: C
Definite Integral of Cosine

Evaluate $$\int_{0}^{\pi/2} \cos(x) dx$$.

  1. A.

    $$\sin(\pi/2) - \cos(0)$$

  2. B.

    $$\cos(\pi/2)$$

  3. C.

    $$\frac{\pi}{2}$$

  4. D.

    $$1$$

Correct answer: D
Definite Integral of Secant Squared

Evaluate the definite integral $$\int_{0}^{\frac{\pi}{4}} \sec^2(x) dx$$ using the Fundamental Theorem of Calculus.

  1. A.

    $$0$$

  2. B.

    $$\frac{\pi}{4}$$

  3. C.

    $$1$$

  4. D.

    $$\frac{1}{2}$$

Correct answer: C
Definite Integral of Secant Squared

What is the value of $$\displaystyle\int_{0}^{\pi/4} \sec^2(x) dx$$?

  1. A.

    $$\displaystyle\frac{\pi}{4}$$

  2. B.

    $$1$$

  3. C.

    $$\displaystyle\frac{1}{2}$$

  4. D.

    $$\sqrt{2}$$

Correct answer: B
Definite Integral of the Sine Function

What is the value of $\displaystyle\int_{0}$^π sin(x)dx?

  1. A.

    0

  2. B.

    2

  3. C.

    1

  4. D.

    π

Correct answer: B
Definite Integral of Trigonometric Functions

Evaluate $$\int_{0}^{\pi/2} \cos(x)\sin(x) dx$$.

  1. A.

    $$0$$

  2. B.

    $$\frac{\pi}{4}$$

  3. C.

    $$\frac{1}{2}$$

  4. D.

    $$1$$

Correct answer: C
Definite Integral with Inverse Tangent

Evaluate $\displaystyle\int_{1}$^4 (x²+1)⁻¹ dx.

  1. A.

    ln(17/2)

  2. B.

    π/4

  3. C.

    tan⁻¹(4) - tan⁻¹(1)

  4. D.

    1/2[tan⁻¹(16) - tan⁻¹(1)]

Correct answer: C
Evaluating a Definite Integral of Cosine

What is the value of $$\int_{\frac{\pi}{3}}^{\pi} \cos(x) dx$$?

  1. A.

    0

  2. B.

    -1

  3. C.

    $$\frac{\sqrt{3}}{2}$$

  4. D.

    $$-\frac{\sqrt{3}}{2}$$

Correct answer: D
Indefinite Integral of Cosine

Find an antiderivative (indefinite integral) of $$\cos(x)$$. Make sure to include the constant of integration.

  1. A.

    $$\sin(x)+C$$

  2. B.

    $$-\cos(x)+C$$

  3. C.

    $$-\sin(x)+C$$

  4. D.

    $$\cos(x)+C$$

Correct answer: A
Integral Equation with Inverse Hyperbolic Sine

Find the value of x that satisfies the equation $$\int_{0}^{x} \frac{1}{\sqrt{1+t^2}} dt = \ln(2).$$

  1. A.

    $$\sqrt{\ln(2)}$$

  2. B.

    $$\frac{5}{4}$$

  3. C.

    $$\ln(2)$$

  4. D.

    $$\sinh(\ln(2))$$

Correct answer: D
Integral of the Arctangent Function

Which of the following is $$\int$$arctan(x) dx?

  1. A.

    xarctan(x) - ln(x²+1) + C

  2. B.

    xarctan(x) - ln(1+x²)/2 + C

  3. C.

    xarctan(x) + ln(1+x²)/2 + C

  4. D.

    xarctan(x) - ln|1+x²|/2 + C

Correct answer: B
Integral of the Inverse Sine Function

$$\int \arcsin(x) dx =$$

  1. A.

    $$\displaystyle x \arcsin(x) + \sqrt{1-x^2} + C$$

  2. B.

    $$\displaystyle\frac{1}{\sqrt{1-x^2}} + C$$

  3. C.

    $$\displaystyle x \arcsin(x) - \sqrt{1-x^2} + C$$

  4. D.

    $$\displaystyle\frac{x^2}{2} \arcsin(x) + \frac{x\sqrt{1-x^2}}{2} + C$$

Correct answer: A
Integrating Inverse Trigonometric Functions

Which integration technique is most appropriate for evaluating integrals that contain inverse trigonometric functions?

  1. A.

    u-substitution

  2. B.

    Trigonometric substitution

  3. C.

    Power rule

  4. D.

    Integration by parts

Correct answer: A
Integrating Powers of Sine and Cosine

Evaluate $$\int \sin^3(x) \cos^2(x) dx$$.

  1. A.

    $$\frac{1}{5}\sin^5(x) + C$$

  2. B.

    $$-\frac{1}{3}\cos^3(x) + \frac{1}{5}\cos^5(x) + C$$

  3. C.

    $$\frac{1}{5}\sin^5(x)\cos(x) + C$$

  4. D.

    $$\frac{1}{4}\sin^4(x) - \frac{1}{6}\sin^6(x) + C$$

Correct answer: D
Integrating Powers of Tangent and Secant

What is the most efficient method for evaluating the integral $$\int$$tan³(x)sec⁵(x)dx?

  1. A.

    Partial fraction decomposition after algebraic manipulation

  2. B.

    Integration by parts with u=tan³(x) and dv=sec⁵(x)dx

  3. C.

    Direct application of power formulas for tangent

  4. D.

    Rewrite using tan²(x)=sec²(x)-1 and then u-substitution

Correct answer: D
Integration of Trigonometric Functions

What is $$\int \sin(x)\cos(x) dx$$?

  1. A.

    $$\sin(x)*\cos(x) + C$$

  2. B.

    $$\frac{(\sin(x))^2}{2}$$

  3. C.

    $$-\frac{(\cos(x))^2}{2} + C$$

  4. D.

    $$\frac{(\sin(x))^2}{2} + C$$

Correct answer: D
Trigonometric Definite Integral

What is the value of $$\int_{0}^{\pi/2} \sin(x)\cos(x) dx$$?

  1. A.

    0

  2. B.

    π/4

  3. C.

    1/2

  4. D.

    1

Correct answer: C
Trigonometric Integral Strategy

Which of the following describes the most efficient method for evaluating the integral $$\int$$sin³(x)cos²(x)dx?

  1. A.

    Use sin²(x) = 1-cos²(x) and then u-substitution

  2. B.

    Integration by parts repeatedly

  3. C.

    Direct application of power rule

  4. D.

    Partial fraction decomposition

Correct answer: A
Trigonometric Integrals With Rational Powers

Which integration technique is typically most effective for an integrand involving a trigonometric function raised to a rational power?

  1. A.

    Trigonometric substitution

  2. B.

    Logarithmic differentiation

  3. C.

    Power rule

  4. D.

    u-substitution

Correct answer: A