If `270^(@) lt A lt 360^(@), 90^(@) lt B lt 180^(@) , cos A =5//13 , tan B=-15//8 " then " cos (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=

270^(@)

If 90^(@) lt A lt 180^(@) , 180^(@) lt B lt 270^(@) and cos A=-(sqrt(3))/(2) , sin B=-(3)/(5) "then" ( 2 tan B + sqrt(3) tan A)/( cot^(2) A + cos B) =

If 90^(@) lt theta lt 180^(@) , cos theta =-12//13 , then sin 2 theta =

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 theta lt 270^(@) , tan theta = 5//12 , " then " cos 3 theta =

If 0 lt A, B lt 90^(@), cos A= (5)/(13) and sin B =(4)/(5) then find sin (A+B) .

If 90^(@) lt A lt 180^(@) and sin A =4/5, then tan ""A/2 is equal to