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H Samarpan from Delhi Public School, asked a question
Subject: Math , asked on 12/5/13

cos ( alpha + beta ) sin ( gamma + delta ) = cos ( alpha - beta ) sin ( gamma + delta ) then prove that cot alpha cot beta cot gamma = cot delta

EXPERT ANSWER

Ajanta , Meritnation Expert added an answer, on 16/5/13
3375 helpful votes in Math

the given equation is: .............(1)

i.e.

now applying componendo and dividendo:

which is the required result.

hope this helps you.

cheers!!

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