91Ó°ÊÓ

Use your graphing calculator to graph each pair of functions for \(0 \leq x \leq 4 \pi\). (Make sure your calculator is set to radian mode.) What effect does the value of \(B\) have on the graph? $$ y=\cos B x \quad \text { for } \quad B=1, \frac{1}{2} $$

Use your graphing calculator to graph each family of functions for \(-2 \pi \leq x \leq 2 \pi\) together on a single coordinate system. (Make sure your calculator is set to radian mode.) What effect does the value of \(k\) have on the graph? \(y=k+\sin x\) for \(k=0,2,4\)

$$ \text { Use a calculator to approximate each value to four decimal places. } $$ $$ \cos 10 $$

$$ \text { Use a calculator to approximate each value to four decimal places. } $$ $$ \cos 10^{\circ} $$

Evaluate without using a calculator. $$ \tan \left(\cos ^{-1} \frac{3}{5}\right) $$

Use your graphing calculator to graph each pair of functions for \(0 \leq x \leq 4 \pi\). (Make sure your calculator is set to radian mode.) What effect does the value of \(B\) have on the graph? $$ y=\cos B x \quad \text { for } \quad B=1, \frac{1}{3} $$

Use your graphing calculator to graph each family of functions for \(-2 \pi \leq x \leq 2 \pi\) together on a single coordinate system. (Make sure your calculator is set to radian mode.) What effect does the value of \(k\) have on the graph? \(y=k+\cos x \quad\) for \(k=0, \frac{1}{2},-\frac{1}{2}\)

$$ \text { Use a calculator to approximate each value to four decimal places. } $$ $$ \tan \left(-25^{\circ}\right) $$

Use your graphing calculator to graph each family of functions for \(-2 \pi \leq x \leq 2 \pi\) together on a single coordinate system. (Make sure your calculator is set to radian mode.) What effect does the value of \(k\) have on the graph? \(y=k+\sin x \quad\) for \(k=0,-2,-4\)

Evaluate without using a calculator. $$ \sec \left(\cos ^{-1} \frac{1}{\sqrt{5}}\right) $$