" (i) "cos alpha=(3)/(5)

If cos alpha=(3)/(5) and cos beta=(5)/(13), then cos^(2)backslash(alpha-beta)/(2)=

if cos alpha=(3)/(5) and cos beta=(4)/(5) find the value of cos((alpha-beta)/(2))

If cos alpha=(3)/(5), then value of (sin alpha-(1)/(tan alpha))/(2tan alpha) is

If cos alpha = (3)/(5) , cos beta = (4)/(5) , find the value of cos ""(( alpha - beta)/( 2)), assuming alpha and beta to be acute angles.

If cos alpha =(3)/(5) and cos beta =(5)/(13) and alpha, beta are acute angles, then prove that (a) sin ^(2)((alpha-beta)/(2))=(1)/(65) and (b) cos ^(2)((alpha+beta)/(2))=(16)/(65)

If cos alpha=-(3)/(5) and sin beta=(7)/(25) where (pi)/(2)

If 0

" If cos(alpha+beta)=(3)/(5) sin(alpha-beta)=(5)/(13) and 0< alpha, beta < (pi)/(4) then tan(2 alpha) is equal to

If alpha,beta are complementary angles and sin alpha=(3)/(5), then sin alpha cos beta-cos alpha sin beta=