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

If theta and phi are positive acute angles satisfying sin theta =1/2 and cos phi =1/3, then the value of (theta + phi) lies in the interval-

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

If theta and phi are acute angle related by a sec theta+b sec phi=c;a,b,c>0, then a cos theta+b cos phi is

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

Statement:1 if cos theta=1/7 and cos phi = 13/14 where theta and phi both are acute angles, then the value of theta-phi is pi/3 . Statement:2 cos(pi/3)=1/2

Statement:1 if cos theta=1/7 and cos phi = 13/14 where theta and phi both are acute angles, then the value of theta-phi is pi/3 . Statement:2 cos(pi/3)=1/2

If cos theta+cos phi=a and sin theta - sin phi=b , then: 2cos(theta + phi) =