The minimum value of the expression `sin alpha + sin beta+ sin gamma`, where `alpha,beta,gamma` are real numbers satisfying `alpha+beta+gamma=pi` is

If tan beta=2sin alpha sin gamma co sec(alpha+gamma) , then cot alpha,cot beta,cotgamma are in

If alpha, beta, gamma are the roots of 9x^3 - 7x + 6 = 0 , then alpha beta gamma is …………

Prove , using mean value theorem, that |sin alpha -sin beta | le| alpha-beta|, alpha, beta in RR .

If cos alpha + cos beta + cos gamma = sin alpha + sin beta + sin gamma = 0 , show that sin 3alpha + sin 3 beta + sin 3gamma = 3 sin (alpha + beta + gamma)

Let alpha, beta, gamma be the measures of angle such that sin alpha+sin beta+sin gamma ge 2 . Then the possible value of cos alpha + cos beta+cos gamma is

A line makes angles alpha,beta,gamma with the coordinates axes . If alpha+beta=90^@ then gamma is equal to

If sin(alpha+beta)sin(alpha-beta)=singamma(2sinbeta+singamma), where 0 < alpha,beta,gamma < pi, then the straight line whose equation is xsinalpha+ysinbeta-singamma=0 passes through point (a) (1,1) (b) (-1,1) (c) (1,-1) (d) none of these

Compare the properties of alpha, beta, and gamma radiations.