if sin A =2/5 find the value of 4+4cosec²a
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sin a = 2/5
cosec a = 1/ sin a
cosec a =5/2
4+4 cosec² a
=4+ 4(5/2)²
=4+4(25/4)
=4+25
=29
cosec a = 1/ sin a
cosec a =5/2
4+4 cosec² a
=4+ 4(5/2)²
=4+4(25/4)
=4+25
=29
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