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Chapter 4: Problem 87
Use a calculator to evaluate the trigonometric function. Round your answer to four decimal places. (Be sure the calculator is in the correct mode.) $$\sin (-0.65)$$
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Graph the functions \(f\) and \(g .\) Use the graphs to make a conjecture about the relationship between the functions. $$f(x)=\sin x-\cos \left(x+\frac{\pi}{2}\right), \quad g(x)=2 \sin x$$
Determine whether the statement is true or false. Justify your answer. To find the reference angle for an angle \(\theta\) (given in degrees), find the integer \(n\) such that \(0 \leq 360^{\circ} n-\theta \leq 360^{\circ} .\) The difference \(360^{\circ} n-\theta\) is the reference angle.
A carousel with a 50 -foot diameter makes 4 revolutions per minute. (a) Find the angular speed of the carousel in radians per minute. (b) Find the linear speed (in feet per minute) of the platform rim of the carousel.
Use a graphing utility to graph the function and the damping factor of the function in the same viewing window. Describe the behavior of the function as \(x\) increases without bound. $$f(x)=2^{-x / 4} \cos \pi x$$
Use a graphing utility to graph the function and the damping factor of the function in the same viewing window. Describe the behavior of the function as \(x\) increases without bound. $$f(x)=\frac{1-\cos x}{x}$$
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