Question

what is the exact value of sin (a)? your answer: not there yet, keep working

Explanation:

Step1: Recall sine - ratio formula

$\sin(A)=\frac{\text{opposite}}{\text{hypotenuse}}$

Step2: Identify opposite and hypotenuse

For angle $A$, opposite side is $4$ and hypotenuse is $5$.

Step3: Calculate $\sin(A)$

$\sin(A)=\frac{4}{5}$

Answer:

$\frac{4}{5}$