Chapter 5: Problem 2
Find all numbers \(t\) such that \(\left(\frac{3}{5}, t\right)\) is a point on the unit circle.
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Chapter 5: Problem 2
Find all numbers \(t\) such that \(\left(\frac{3}{5}, t\right)\) is a point on the unit circle.
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Suppose \(u\) and \(v\) are in the interval \(\left(\frac{\pi}{2}, \pi\right),\) with \(\tan u=-2\) and \(\tan v=-3\) Find exact expressions for the indicated quantities. $$ \cos (v-6 \pi) $$
Without using a calculator, sketch the unit circle and the radius that makes an angle of \(\sin ^{-1}(-0.1)\) with the positive horizontal axis.
Explain why $$ |\sin \theta| \leq|\tan \theta| $$ for all \(\theta\) such that \(\tan \theta\) is defined.
Suppose \(u\) and \(v\) are in the interval \(\left(\frac{\pi}{2}, \pi\right),\) with \(\tan u=-2\) and \(\tan v=-3\) Find exact expressions for the indicated quantities. $$ \sin \left(\frac{\pi}{2}-v\right) $$
Show that $$ \cos \left(\tan ^{-1} t\right)=\frac{1}{\sqrt{1+t^{2}}} $$ for every number \(t\).
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