cos x+cos y=1/3,sin x+sin y=1/4" then "sin(x+y)=

If cos x+ cos y = 1//3 , sin x + sin y=1//4 " then " cos (x+y)=

If cos x-cos y=0=sin x+sin y then sin(2020x)+sin(2020y) is equal to

If sin x cos y=(1)/(4) and 3tan x=4 then sin(x-y)=

cos x + cos y = (1) / (3), sin x + sin y = (1) / (4) rArr sin (x + y)

If cos x + cos y =(1)/(3) and sin x + sin y=(1)/(4) prove that tan ((x+y)/(2))=(3)/(4)

If sin x cos y=(1)/(4) and 3tan x=4tan y then sin(x-y)=

If sin x cos y=(1)/(4) and 3tan x=4tan y then sin(x-y)=

If cos x.cos y + sin x.sin y = -1 then cos x + cos y is यदि cos x.cos y + sin x.sin y = -1 हो, तो cos x + cos y का मान क्या होगा?