Question: X 2. Application of Double-angle Formula (a) sec 0 = 12, QIV, find sin 20 , cos 20 and tan 20 (b) Evaluate sin 20,

X 2. Application of Double-angle Formula (a) sec 0 = 12, QIV, find sin 20 , cos 20 and tan 20 (b) Evaluate sin 20, cos 20 and tan 20, 0 = cos -13 (c) Simplify sin(2 tan-1 0)

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