2co s ec^(2)23^(@)" "cos^(2)67^(@)-sin^(...

`2co s ec^(2)23^(@)" "cos^(2)67^(@)-sin^(2)23-2co s ec^(2)23^(@)cot^(2)67^(@)-sin^(2)23^(@)-sin^(2)67-cot^(2)67^(@)` किसके बराबर है?

A

1

B

`sec^(2) 23^(@)`

C

`tan^(2) 23^(@)`

D

0

Verified by Experts

The correct Answer is:

B

2co s ec^(2)23^(@)" "cos^(2)67^(@)-sin^(2)23-2co s ec^(2)23^(@)cot^(2)...
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2co s ec^(2)23^(@)" "cos^(2)67^(@)-sin^(2)23-2co s ec^(2)23^(@)cot^(2)...
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sin^(2) 85^(@) + sin^(2) 5^(@) + sin^(2) 67^(@) + sin^(2) 23^(@) = 2
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