Mon August 22, 2011 By: Anshul Kansal
Prove that:
1.sec A + cos A can never be equal to 3/2.
2.cosec square A + sin square A can never be less than 2
3.(a+b)whole square=4absin square A is possible only when a=b

How to prove these.

Expert Reply
Mon August 22, 2011
Kindly post only one query at a time .
The answer of the first one is as follows
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