1.

Let alpha, beta and gammabe some angles in the first quadrant satisfying tan(alpha + beta)=15//8 and "cosec" gamma = 17//8, then which of the following hold(s) good ?

Answer»

`ALPHA + BETA + gamma=pi`
`cot alpha cot beta cotgamma = cot alpha + cotbeta + cot gamma`
`TAN alpha + tan beta + tan gamma = tan alpha tan beta tan gamma`
`tan alpha tan beta + tan beta tangamma + tan gamma tan alpha =1`

Answer :B::D


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