Question

SinA.CosA= 1/2 then find the value of A

Answer 1

Step-by-step explanation:

sin (A/2)= 1/2 =sin (A/2)=sin (30°)=sin(180-30) A/2= 30° or 150° A= 60° or 300° sin(A)=sin (60°)=√3/2 sin(A)=sin (300°)=sin(360°+ -60°)=sin(-60°)=-sin (60°)=(-√3)/2 sin A= ±(√3/2) formula used: sin x= sin(180°-x) sin (360sin x= sin(180°-x)

sin (360° +x)=sin(x)

sin(-x)=-sin(x)