prove that sec^2 54 -cos^2 36/cosec^2 57 -tan^2 33 + 2sin ^2 - sec^2 52=5/2
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Step-by-step explanation:
sec²54-cos²36/cosec²57-tan²33+2sin²28-sec²52
=sec²α+cos²(90°-α)/cosec²a-tan(90°-a)+2sin²b-sec²(90°-b)
=sec²α+sin²α/cosec²a-cot²a+2sin²b-cosec²b
=2sec²α/1+2sin²b-1/sin²b
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