Trigonometry Identities I Introduction

Sin2x + Cos 2x = 1 (trig identity) smxcosx smxcosx sm sm x —cos x x cos2 x ... 1) o 3 3 0 0 2Cos We see a Cosine term and a Sine term. To make them the same: we can substitute the identity: (1 - sin ) = cos ... (2SinX - + - Identities: Identities: Identities: = CSC . SOLUTIONS and ... ................
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