यदि alpha, beta एवं gamma प्रत्येक धनंत...

यदि `alpha, beta ` एवं `gamma` प्रत्येक धनंतक न्यूनकोण हो एवं `sin (alpha + beta - gamma) = (1)/(2), cos (beta + gamma -alpha) = (1)/(2)` एवं `tan (gamma + alpha -beta) =1` तो `2alpha + beta = ?`

A

`105^(@)`

B

`115^(@)`

C

`110^(@)`

D

`120^(@)`

लिखित उत्तर

Verified by Experts

The correct Answer is:

D

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