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Question

The general value of θ in the equation cosθ=12,tanθ=1 is

A
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B
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C
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D
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Solution

The correct option is B
Here θ lies in the 4th quadrant.
θ=2ππ4=7π4
Now considering the equation,
cosθ=cos7π4
General value of θ=2nπ±7π4,nI

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