Question

plzz help..............................prove that ​

Answer 1

$(sin^4A-cos^4A+1)cosec^2A\\=[(sin^2A)^2 -(cos^2A)^2 +1]cosec^2A\\=[(sin^2A+cos^A)(sin^2A-cos^2A)+1]cosec^2A\\=[(sin^2A-cos^2A)+1]cosec^2A\\=[sin^2A + (1 -cos^2A)]cosec^{2}A\\=(sin^2A +sin^2A)cosec^2A\\=2.sin^2A.cosec^2A\\=2$

Answer 2

Answer:

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