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Question

If cosθ=45, then sinθ=...... and tanθ=......

A
35,34
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B
53,43
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C
23,45
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D
None of these
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Solution

The correct option is A 35,34

1) Using sin2θ+cos2θ=1
sin2θ+(45)2=1
sin2θ=11625=925
sinθ=35

2) tanθ=sinθcosθ
=3545=3×54×5
tanθ=34
Hence correct option is 'A'

626659_458490_ans_f6bf2107de544bc29bb12b1b7f8ac0e1.JPG

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