2 years ago

Verify the basic identity. What is the domain of the validity? cot x= cos x csc x

1 answer:

4 0

Expand and simplify LHS - Apply identity sin^2x+cos^2x = 1 To verify: (cotx - cscx)(cosx+1) =-sinx LHS=(cosx/sinx - 1/sinx)(cosx+1)

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