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Magazine Problem 20
Use the unit circle and the fact that sine is an odd function and cosine is an even function to find the exact values of the indicated functions. $$\cos \left(-\frac{5 \pi}{3}\right)$$
Problem 21
In Exercises \(9-28,\) graph the functions over the indicated intervals. $$y=\cot \left(x-\frac{\pi}{4}\right),-\pi \leq x \leq \pi$$
Problem 21
Use the unit circle and the fact that sine is an odd function and cosine is an even function to find the exact values of the indicated functions. $$\cos \left(-\frac{5 \pi}{6}\right)$$
Problem 21
In Exercises \(21-32,\) graph the given function over one period. $$y=8 \cos x$$
Problem 22
Use the unit circle and the fact that sine is an odd function and cosine is an even function to find the exact values of the indicated functions. $$\cos \left(-\frac{7 \pi}{4}\right)$$
Problem 22
In Exercises \(9-28,\) graph the functions over the indicated intervals. $$y=-\cot \left(x+\frac{\pi}{2}\right),-\pi \leq x \leq \pi$$
Problem 22
In Exercises \(21-32,\) graph the given function over one period. $$y=7 \sin x$$
Problem 23
Use the unit circle and the fact that sine is an odd function and cosine is an even function to find the exact values of the indicated functions. $$\sin \left(-\frac{5 \pi}{4}\right)$$
Problem 23
In Exercises \(21-32,\) graph the given function over one period. $$y=\sin (4 x)$$
Problem 23
In Exercises \(9-28,\) graph the functions over the indicated intervals. $$y=-\frac{1}{2} \cot \left(x+\frac{\pi}{3}\right),-\pi \leq x \leq \pi$$
