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Question

If sin1x+sin1y=π2, then cos1x+cos1y is equal to

A
π2
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B
π4
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C
π
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D
3π4
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Solution

The correct option is A π2
Given : sin1x+sin1y=π2(1)
We know that,
sin1x+cos1x=π2sin1x=π2cos1x

Equation (1) becomes
π2cos1x+π2cos1y=π2cos1x+cos1y=π2

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