question is wrong (Question: 277523.0 )

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Vilakshan Kuntal

· started a discussion

· 1 Months ago

question is wrong (Question: 277523.0 )

please put cos (n+2)instead of cos (n+1)in both cos

Question:

The value of sin(n + 1) $θ$ . sin(n + 2) $θ$ + cos(n + 1) $θ$ . cos(n + 2) $θ$ is equal to:-

Options:

sin $θ$

cos $θ$

– cos $θ$

sin² $θ$

Solution:

Ans: (b)

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question is wrong (Question: 277523.0 )

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