If `cosA=5/13, tan B=-15/8,270^@ lt A lt 360^@,90^@ lt B lt 180^@` , then the quadrant to which `A+B` belongs is

If cos A =-3//5 , sin B=7//25 and 90^(@) lt A lt 180^@,0^(@) lt B lt 90^(@) , "then " tan (A+B)=

If cos alpha = -12//13 , cot beta = 24//7 , 90^(@) lt alpha lt 180^(@) and 180^(@) lt beta lt 270^(@) , then the quadrant in which alpha + beta lies

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

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 =3/5, 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 tan A = 1 (0^@ lt A lt 90^@ ) and cos B = (1)/(sqrt2)(0^@ lt B lt 90^@) , then find the value of cos (A + B).

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

If sectheta=-13//5, where 90^(@) lt theta lt 180^(@), , then : sintheta=…….