Bride Cancels Wedding After Groom Fails Math Test "In the 2000 years since trigonometry was discovered ... is independent of the Pythagorean trig identity \sin^2x + \cos^2x = 1." ...
There are some trigonometric identities which you must remember in order to simplify trigonometric expressions when required. When you are asked to prove something, ignore the right hand side of ...
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