Question

if A+B=90° prove 1+cotA/cotB=cosec 2 A​

Answer 1

Step-by-step explanation:

+ B = 90° => A = 90 - B

So Tan A = Cot (90 - A) = Cot B

So Tan B = Cot (90 - B) = Cot A

SecB = Cosec (90 -B) = Cosec A

CosA = Sin (90 -A) = Sin B

substitute these in the LHS,

Answer 2

Here
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