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JEE Main 2009Medium

Q.The value of sin⁡(π+θ)sin⁡(π−θ)+cos⁡(π+θ)cos⁡(π−θ)\sin(\pi + \theta) \sin(\pi - \theta) + \cos(\pi + \theta) \cos(\pi - \theta) is

a
1
b
-1
c
0
d
2

Correct Answer: Option B

The correct solution involves applying the fundamental concept to derive the final value step by step...

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