Question

Based on the diagram, what is sinA ? Enter your answer as a fraction in the boxes.

Answer 1

For this case, we have that by definition:

$Sine (x) = \frac {Cathet \ opposite \ to \ angle \ x} {Hypotenuse}$

In this case we are asked to find the expression as a function of angle A.

Observing the figure we have:

$Sine (A) = \frac {a} {c}$

In an equivalent way we have:

$Sine (A) = \frac {BC} {BA}$

ANswer:

$Sine (A) = \frac {a} {c}\\Sine (A) = \frac {BC} {BA}$

Answer 2

Answer:

sinA = $\frac{a}{c}$

Step-by-step explanation:

sinA = $\frac{opposite}{hypotenuse}$ = $\frac{BC}{AB}$ = $\frac{a}{c}$