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Question

If cosec θ=2 and tanθ=1,cosθ is

A
12
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B
32
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C
1
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D
12
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Solution

The correct option is B 12
We know that sin(A)=1cosec A
So, sin(θ)=1cosec θ=12
And, tan(θ)=sin(θ)cos(θ)=1

tan(θ)=12cos(θ)=1

cos(θ)=12

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