The sides of a triangle inscribed in a circle subtend anles `alpha, beta, gamma` at the centre. The minimum value of the arithmetic mean of `cos(alpha+pi/2), cos (beta+pi/2), cos (gamma+pi/2)` is equal to

The side of a triangle inscribed in a given circle subtends angles alpha,betaa n dgamma at the centre. The minimum value of the arithmetic mean of cos(alpha+pi/2),cos(beta+pi/2) , and cos(gamma+pi/2) is equal to ____

The sides of a triangle inscribed in a given circle subtends angles alpha,beta,gamma at the centre.Then,the minimum value of the arithmetic mean of cos(alpha+(pi)/(2)),cos(beta+(pi)/(2)),cos(gamma+(pi)/(2)) is

If alpha+beta+gamma=2pi then

cos^(2) alpha +cos^(2) beta +cos^(2) gamma is equal to

If a line makes angles alpha, beta, gamma, delta with the diafonals of a cubes then the value of 9(cos 2alpha + cos 2beta + cos2gamma + cos 2delta)^(2) equals ….......

If alpha,beta,gamma are the lengths of the altitudes of Delta ABC, then (cos A)/(alpha)+(cos B)/(beta)+(cos C)/(gamma)=

alpha, beta, gamma are real number satisfying alpha+beta+gamma=pi . The minimum value of the given expression sin alpha+sin beta+sin gamma is

If cos alpha,cos beta,cos gamma are the direction cosine of a line,then find the value of cos^(2)alpha+(cos beta+sin gamma)(cos beta-sin^(2)gamma

If alpha + beta + gamma=pi, then the value of sin ^(2) alpha + sin ^(2) beta - sin^(2) gamma is equal to