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Question

What is the value of cos256+cos234sin256+sin234+3tan256×tan234

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 D 4
cos256+cos234sin256+sin234+3tan256×tan234=sin2(9056)+cos234cos2(9056)+sin234+3cot2(9056)×tan234=sin234+cos234cos234+sin234+3cot234×tan234=1+3=4

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