Question

1+cos2thita=2cossqare thita solve plzzz

Answer 1

\[\cos 2 \theta= \cos^2 \theta-\sin^2 \theta\]

Answer 2

\[1=\sin^2 \theta +\cos ^2 \theta \]

Answer 3

then

Answer 4

now cant u do it ? :)

Answer 5

substitute in LHS to get RHS hence proved !