Find the exact value of sin A and cos A where a = 9 and b = 10 and

asked Feb 2, 2023 222k views

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Given data:

a=9 , b = 10

use the phythagoras theorem,

$c=\sqrt[]{a^2+b}^2$
$\begin{gathered} c=\sqrt[]{9^2+10^2} \\ c=\sqrt[]{81+100} \\ =\sqrt[]{181} \end{gathered}$

thus,

$\sin A=\frac{opp}{\text{hypo}}$
$\text{sinA}=\frac{9}{\sqrt[]{181}}$

and,

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