Question

Find the value of x if cosx=cos40×cos50+sin 40×sin 50

Answer 1

Answer:

Step-by-step explanation:

HEY!!

HERE IS YOUR ANSWER   :-  

given Cosx =cos40°.sin50°+sin40°.cos50°

=cos(90°-50°).sin50°+sin(90°-50°).cos50°

=sin50°.sin50°+cos50°.cos50°

=sin^2 50°+ cos^2 50°

=1

Now,cos x = 1

cos x =cos 0°

x=0

MARK AS BRAINLIST IF HLPED ^_^

Answer 2

hope this answer helpful u