Proofs of Double Angle Identities

Lesson#1 <br /> Proofs of Double Angle Identities <br />Exercise 10.3 <br />Double Angle Identities <br />Prove the following identity: <br />sin⁡ 2 = 2 sin⁡ cos⁡ <br />Math.Ex.10.3, Part1(10.3) <br />cos 2α = cos^2 α − sin^2 α = 2cos^2 α−1 = 1 − 2sin^2 α <br />tan⁡ 2α = (2 tan⁡α)/(1−tan^2 α) <br />Trigonometric Identities <br />Chapter No 10 <br />Exercise No 10.3 <br />Mathematics <br />part 1