If `alpha and beta` are two positive acute angles satisfying `alpha-beta=15^@` and `sinalpha=cos2beta` then the value of `alpha+beta`

If alpha and beta are two positive acute angles satisfying alpha-beta=15^(@) and sin alpha=cos2 beta then find the value of alpha+beta

If alpha and beta are two positive acute angles satisfying alpha-beta=15^(@) and sin alpha=cos2 beta then the value of alpha+beta is equal to -(A)35^(@) (B) 55^(@) (C) 65^(@) (D) 85^(@)

alpha and beta are the positive acute angles and satisfying equations 5 sin 2 beta = 3 sin 2 alpha and tan beta = 3 tan alpha simultaneously. Then the value of tan alpha *tan beta is _______________.

alpha, beta are positive acute angle and sec^2 alpha - cot^2 (beta/2) = 1 , then___

If alpha and beta are positive acute angles and cos2alpha=(3cos2beta-1)/(3-cos2beta) ,then prove that tan alpha=sqrt2tanbeta

If alpha and beta are acute angles satisfying cos2 alpha=(3cos2 beta-1)/(3-cos2 beta), then tan alpha=sqrt(2)tan beta (b) (1)/(sqrt(2))tan beta(c)sqrt(2)cot beta(d)(1)/(sqrt(2))cot beta

If alpha, beta, gamma are positive acute angles, prove that sin alpha+sin beta+ sin gamma gt sin (alpha+ beta+ gamma)