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to attempt only one of the alternatives in all suca qUeSLOOPLS(v) Use of calculators is not permitted.Section AQuestion numbers 1 to 10 are of one mark each.1. If0 and 30-30° are acute angles such that sin 0-cos (30-30), then tan 0 is equal to(a) 1(b)1(d) 1V3is equal tont Gno then |
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Answer» Θ and (3θ-30°) are acute angles such thatsinθ=cos(3θ-30°)or, sinθ=sin[90°-(3θ-30°)] [∵, cosθ=sin(90°-θ)]or,θ=90°-3θ+30°or,θ+3θ=120°or, 4θ=120°or,θ=30°∴, tanθ=tan30°=1/√3 |
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