Question:
(Cos©+sin©+1)×(sin©+Cos©-1)=?
©= theta.
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Answer:
Since, a²+2ab+b²−c²
Therefore, cos²+2cos×sin+sin²-1²
=1-sin²+2cos×sin+sin²-1..........(sin²+cos²=1)
=2cos×sin
Hope this helps you
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