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The value of int(-pi)^(pi) sin^(3) x cos...

The value of `int_(-pi)^(pi) sin^(3) x cos^(2)x dx` is

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To solve the integral \( \int_{-\pi}^{\pi} \sin^3 x \cos^2 x \, dx \), we can follow these steps: ### Step 1: Identify the nature of the function We need to determine whether the function \( f(x) = \sin^3 x \cos^2 x \) is an odd or even function. ### Step 2: Check for odd/even function To check if \( f(x) \) is odd, we evaluate \( f(-x) \): \[ f(-x) = \sin^3(-x) \cos^2(-x) \] Using the properties of sine and cosine: \[ \sin(-x) = -\sin(x) \quad \text{and} \quad \cos(-x) = \cos(x) \] Thus, \[ f(-x) = (-\sin(x))^3 \cdot (\cos(x))^2 = -\sin^3(x) \cos^2(x) = -f(x) \] Since \( f(-x) = -f(x) \), we conclude that \( f(x) \) is an odd function. ### Step 3: Evaluate the integral The integral of an odd function over a symmetric interval around zero is zero: \[ \int_{-a}^{a} f(x) \, dx = 0 \] In our case, since the interval is from \( -\pi \) to \( \pi \): \[ \int_{-\pi}^{\pi} \sin^3 x \cos^2 x \, dx = 0 \] ### Final Answer Thus, the value of the integral is: \[ \int_{-\pi}^{\pi} \sin^3 x \cos^2 x \, dx = 0 \] ---

To solve the integral \( \int_{-\pi}^{\pi} \sin^3 x \cos^2 x \, dx \), we can follow these steps: ### Step 1: Identify the nature of the function We need to determine whether the function \( f(x) = \sin^3 x \cos^2 x \) is an odd or even function. ### Step 2: Check for odd/even function To check if \( f(x) \) is odd, we evaluate \( f(-x) \): \[ ...
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Knowledge Check

  • int_(-pi)^(pi)sin^(2)x.cos^(2)x dx=

    A
    0
    B
    `int_(0)^(pi//2)sin^(2)x.cos^(2)x dx`
    C
    `4 int_(0)^(pi//2)sin^(2)x.cos^(2)x dx`
    D
    1
  • The value of int_(-pi)^(pi) (1-x^(2)) sin x cos^(2) x dx is

    A
    0
    B
    `pi- (pi^(3))/(3)`
    C
    `2pi- pi^(3)`
    D
    `(pi)/(2)- 2pi^(3)`
  • The value of int_(-pi)^(pi)(1-x^(2)) sin x cos^(2) x" dx" , is

    A
    0
    B
    `pi-(pi^(3))/(3)`
    C
    `2pi-pi^(3)`
    D
    `(pi)/(2)-2pi^(3)`
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