Find the product : (1_Costa) (1+cosa
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Explanation:
At first multiply and divide this with (1-cos A)
1−cosA1+cosA⋅1−cosA1−cosA
=(1−cosA)21−cos2A
=(1−cosA)2sin2A
=(1sinA−cosAsinA)2
=(cosecA−cotA)2
Step-by-step explanation:
It is (cosecA−cotA)2
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