1.

Let alpha=sin^(-1)(36/85), beta=cos^(-1)(4/5) and gamma=tan^(-1)(8/15) then

Answer»

`cot ALPHA+cot beta+cot GAMMA=cot alpha cot beta cot gamma`
`tan alpha tan beta+tan beta tan gamma+tan alpha tan gamma=1`
`tan alpha +tan beta+tan gamma=tan alpha tan beta tan gamma`
`cot alpha cot beta+cot beta cot gamma +cot alpha cot gamma=1`

ANSWER :A::B


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