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Question

sec 17cosec 73+tan 68cot 22[cos2 44+cos2 46]=___.


A

0

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B

-1

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C

2

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D

1

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Solution

The correct option is D

1


sec 17cosec 73+tan 68cot 22[cos2 44+cos2 46]

=sec 17cosec (9017)+tan 68cot (9068)[cos2 44+cos2 (9044)]

=sec 17sec 17+tan 68tan 68[cos2 44+sin2 44]....(complementary angles)

=1+11

=1


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