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Question

The value of tan{12cos1(53)} is

A
3+52
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B
3+5
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C
12(35)
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D
None of these
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Solution

The correct option is D 12(35)
Let cos1(53)=α then cosα=53, where 0<α<π2.
Now, tanα2=1cosα1+cosα= 15/31+5/3
=353+5= (35)295
=12(35)

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