How do you solve #cos x - 2sin^2 x = 2cos^2x + cos x -2#?
1 Answer
Jul 20, 2016
Refer to the details given in Explanation.
Explanation:
In fact, this is an Identity and not an eqn. to be "solved"
Despite, if we want to consider it as an eqn., its soln. set will clearly be
As regards proving it as an Identity, we have,
Hence, the Proof.
