If `sin A=3/5 and cos B = 9/41, 0 lt A lt pi/2, 0 lt pi/2 , 0 lt B lt pi/2`. Find the values of that : `cos (A-B)`

If 0 lt x lt pi /2 then

If 0 lt x lt pi/2 then

If 0 lt x lt pi/2 then

If sinA=3/5, 0 lt A lt pi/2 and cosB=-12/13, pi lt B lt (3pi)/2 , then find the values of the following: (i) sin(A-B)

If cosA=-sqrt(3)/2, sinB=-5/13 , where pi/2 lt A lt pi, (3pi)/(2) lt B lt 2pi , find the value of tan(A-B) .

If tan x=(-5)/(12) " and " (pi)/(2) lt x lt pi find the value of cos 2x

If tanA=2, secB=-5/3 , where pi lt A lt (3pi)/(2) , pi/2 lt B lt pi , then i) Find the value of tan(A+B) , ii) find the quadrant in which (A+B) terminates.

If cos A =3/5, cos B=4/5 and (-pi)/(2) lt A lt 0,(-pi)/(2) lt B lt 0, then the value of 2 sin A+4 sin B=

If (cos A)/3= (cos B)/4= 1/5, - pi/2 lt A lt 0 and - pi/2 lt B lt 0 then the value of 2 sin A + 4 sin B is