1.

If the angles alpha, beta, gamma of a triangle satisfy the relation, sin ((alpha - beta)/(2)) + sin ((alpha - gamma )/(2)) + sin (( 3 alpha )/(2)) = 3/2, then The measure of the smallest angle of the triangle is

Answer»

`30^(@)`
`40^(@)`
`45^(@)`
`50^(@)`

Answer :B


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