Easy Sol. (Question: 277523.0 )

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Ravindra singh rathore

· started a discussion

· 1 Months ago

Easy Sol. (Question: 277523.0 )

Put n=0. Use formula CosA.CosB+SinA.SinB=Cos(a-B)

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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Easy Sol. (Question: 277523.0 )

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