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Question

The value of sin(sin−113+sec−13)+cos(tan−112+tan−12) is


A

1

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B

2

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C

3

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D

4

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Solution

The correct option is A

1


sin(sin1(13)+sec1(3))+cos(tan1(12)+tan1(2))
=sin(sin1(13)+cos1(13))+cos(tan1(12))+cot1(12)=sinπ2+cos
(sin1x+cos1x=π2 and tan1x+cos1x=π2)=1


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