Given that $\sin 58^\circ = b$, express each of the following in terms of $b$. $\cos 58^\circ$

Question

Given that $\sin 58^\circ = b$, express each of the following in terms of $b$. $\cos 58^\circ$ $\cos 122^\circ$ $\tan 238^\circ$ $\tan 32^\circ$ $\cos 32^\circ$

Accepted Answer

(a) $\sqrt{1-b^2}$, (b) $-\sqrt{1-b^2}$, (c) $\frac{b}{\sqrt{1-b^2}}$, (d) $\frac{\sqrt{1-b^2}}{b}$, (e) $b$

Trigonometry - Symmetry of Trigonometric Functions

Trigonometry - Symmetry of Trigonometric Functions

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