Question

prove it

cot`¹x+cot`¹y=cot`¹ xy-1/y+x​

Answer 1

Answer:

cot`¹x=alfa

cot`¹y=beta

:.cot alfa =x ans cot beta=y

Now, cot(alfa+beta) =cot alfa cot beta -1/cot beta+cot alfa

=xy-1/y+x

:.alfa + beta = cot`¹ xy-1/y+x

or, cot`¹ x + cot`¹ y= cot`¹ xy-1/y+x

(prove)

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