Question

sin A= ?
c/a
a/c
a/b
b/c​

Answer 1

Answer:

$\sin A = \frac{a}{b}$

Step-by-step explanation:

Given:

We took here a Right Angle Triangle,Δ ABC at angle B as 90°

Side opposite to angle A = a

Side opposite to angle B = b = Hypotenuse

Side opposite to angle C = c

To Find:

Sin A = ?

Solution:

Property of a Sine rule for a Right Angle Triangle.

$\sin A =\frac{\textrm{side opposite to angle A}}{Hypotenuse}\\\sin A =\frac{a}{b}$

∴ $\sin A = \frac{a}{b}$