[" 5) "sin A=4/5],[cos B=5/13]

If sin A= 4/5 and cos B =- 12/13, where A and B lie in first and third quadrant respectively, then cos (A+B)=

If sinA=(4)/(5)andcosB=(5)/(13) , where 0ltA,Blt(pi)/(2) then find (i) sin(A+B) (ii) cos(A-B) .

If sinA=4/5 and cosB=5/(13), where 0 < A,B < pi/2 ,find the value of the cos(A+B)

If B,A+B are acute angle , sin(A+B)=12/13, sin B=5/13 then sin A =

In triangle ABC, if b=3, cos A=3/5 and cos B=5/13 then find the value of (5c)/2

If in a !ABC sin A = 4/5 and sin B = 12/13 , then sin C =

0 lt A lt 90^@ : 0 lt B lt 90^@ , sin A=12/13 and cos B= 4/5 . Find the vaue of sin (A+B).

If 180^(@) lt A lt 270^(@) , 270^@ lt B lt 360^(@) and sin A = -5//13 , sec B=5//4 , then sin A cos B+ cos A sin B=

If sin alpha=4/5 and cos beta =5/13, prove that cos ((alpha-beta)/2)=8/sqrt 65.

If (sin A + cos A) / ( sin A - cos A) = 5/4 , the value of (tan 2 A + 1) / (tan 2 A - 1) = ? A. 41/40 B. 12/13 C. 40 / 41 D. 3/5