[" (C) "75^(@)],[" a and "beta" are positive acute angles,then "]

If sin (alpha - beta) =1/2 and cos (alpha + beta) =1/2, where alpha and beta are positive acute angles, then alpha and beta are

If sin (alpha - beta) =1/2 and cos (alpha + beta) =1/2, where alpha and beta are positive acute angles, then alpha and beta are

if cos alpha=(12)/(13),cos beta=(3)/(5),cos gamma=(63)/(65) and alpha,beta,gamma are positive acute angles,then alpha+beta+gamma is equal to

If sin alpha = 1/sqrt10, cos beta = 2/sqrt5 "and" alpha, beta are positive acute angles, then find the value of (alpha + beta)

If " "alpha " and " beta " are positive acute angles and " cos 2 alpha = (n cos 2 beta-1)/(n- cos 2 beta) (n>1), show that sqrt (n-1)tan alpha = sqrt(n+1) tan beta.

If" "alpha " and " beta are positive acute angles and cos 2 alpha = (3 cos 2 beta-1)/(3-cos 2 beta),"show that", tan alpha = sqrt2 tan beta

If sin (2alpha - beta) = 1 , cos (α +β ) =1/2 where α and β are positive acute angles, then Find α and β

alpha=(1)/(sqrt(10))*sin beta=(1)/(sqrt(5)) (where alpha,beta and alpha+beta are positive acute angles) show that alpha+beta=(pi)/(4)

sinalpha=1/(sqrt(10))*sinbeta=1/(sqrt(5)) (where alpha,beta and alpha+beta are positive acute angles). show that alpha+beta = pi/4