Trigonometry Identities I Introduction - Math Plane

2Cosx - 1 x- 1/2 x = 60, 300 Check X 2 cos x cos x cos x cos x 80 60 2 /2 0 0 0 0 both sides by Cosine) (square root both sides) CotX= cscx -2 (TalLX) cscx 2TalLX Sin X cos x Step 1: Try to simplify and get a common trig sign. ... (2SinX - + - Identities: Identities: ................
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