Question

if cos(40°+2x)= sin30°,where (40°+2x) is an acute angle.Find the value of x

Answer 1

HELLO MATE.......!!!!!!!!

Given = cos(40°+2x) = sin30°

so, cos (40°+2x)= sin (90°- 60°)

cos( 40°+2x)= cos 60°

then,cos cancelled each other..

and remains..40°+2x = 60°

2x = 60°- 40°

X = 20°/ 2

so,X = 10°

HOPE it's clear.....

Answer 2

hey mate here is ur answer

given

cos(40+2x)=sin30

cos(40+2x)=sin(90-60)

cos(40+2x)=cos60

40+2x=60

2x=60-40

x=20/2

x=10

hope it helps u plz Mark it