[" (1) Find "cos(theta+phi)" where "theta" and "phi" are acute angles and "],[sin theta=(4)/(5)" and "sin phi=(3)/(5)" ."]

If theta and phi are acute angle. If costheta=(3)/(5) and cosphi=(4)/(5) then cos(2theta+3phi)=?

If theta and phi are acute angles satisfying sin theta=1/2, cos phi=1/3 then theta+phi=

If theta and phi are acute angles satisfying sin theta=1/2, cos phi=1/3 then theta+phi=

If costheta=3/5 and cosphi=4/5 , where theta and phi are positive acute angles, then cos((theta-phi)/2)=

If cos theta = 3/5 and cos phi =4/5, where theta and phi are positive acute angles, then cos ""(theta - phi)/(2)=

If costheta=(3)/(5)andcosphi=(4)/(5) , where theta and phi are positive acute angles, then cos((theta-phi)/(2))=?

If theta and phi are acute angles, sin theta=1/2, cos phi= 1/3 , then the value of (theta + phi) is:

Given both theta and phi are acute angles and sin theta = (1)/(2), cos phi = (1)/(3) , then the value of theta + phi belongs to

If theta+phi=(pi)/(2) where theta and phi are positive then (sin theta+sin phi)sin((pi)/(4)) is always less than

If sin theta=5sin(theta+phi) then tan(theta+phi)=