Question

3+2cos^2(x)=5cos^2(x)+3sin^2(x)

Answer 1

Replace sin^2x with 1-cos^2x. Get it equal to 0 and factor.

Answer 2

Thank you

Answer 3

yw

Answer 4

3+ 2cos^2x= 5cos^2x+ 3sin^2x
lhs= 3+ 2cos^2x = 3( sin^2x+cos^2x) + 2cos^2x
=3 sin^2x+3cos^2x + 2cos^2x
=5cos^2x+ 3 sin^2x
=rhs
put sin^2x +cos^2x = 1