MATH OLYMPIAD (Trigonometric identities ) check out the tricks..

In this video I showed how students can manipulate trigonometric identities to prove any given trigonometric expression. Sometimes, to prove trigonometric expression could be difficult even for smart students but the video explained to students the basic tricks and knowledge on how to go about proving trigonometric problems, especially of Olympiad standard.

@begechorimaths2975

[joohncj]

Just use formula of a3+b3 = (a+b)(a2 + b2 -ab).

You get solution in one line.