Question

prove the i identity by manipulating left hand expression into the right hand expression?
(cos(x)+sin(x))^2=1+sin(2x)

Answer 1

(cos(x)+sin(x))^2
cos(x)^2+sin(x)^2+2cos(x)sin(x)
1+2cos(x)sin(x)
1+sin(2x)

Answer 2

thank you.