Question

The given problem refers to right triangle ABC with C = 90°. Use the given information to find the exact value of the six trigonometric functions of A. b = 15, c = 17

Answer 1

notice the picture below

using the pythagorean theorem, what do you think side "a" would be?

$\bf c^2=a^2+b^2\implies \sqrt{c^2-b^2}=a\qquad \begin{cases} b=15\\ c=17 \end{cases}$