[" 3) "(1)/(m+n),AA k in L" and cosxcosy "=1/4" then "],[" If "cos x+cos y=1" and "],[" the "G.S" are "]

If cos x+cos y=1 and cos x cos y=(1)/(4) then the G.S are

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

prove that tan ((pi) / (4) + (1) / (2) cos ^ (- 1) ((a) / (b))) + tan ((pi) / (4) - (1) / (2) cos ^ (- 1) ((a) / (b))) = (b) / (a) cos ^ (- 1) ((cos x + cos y) / (1 + cos x cos y) ) = 2tan ^ (- 1) ((tan x) / (2) (tan y) / (2))

Sketch the graph for y=cos^(-1)x, AA x in [-1, 1] .

Sketch the graph for y=cos^(-1)x, AA x in [-1, 1] .

Sketch the graph for y=cos^(-1)x, AA x in [-1, 1] .

Sketch the graph for y=cos^(-1)x, AA x in [-1, 1] .

Sketch the graph for y=cos^(-1)x, AA x in [-1, 1] .

If the maximum and minimum value of (sin x-cos x-1)(sin x+cos x-1)AA x in R is M and m the n find value of (M-4m)

y = tan ^ (- 1) ((1) / (cos ^ (2) x + cos x + 1)) + tan ^ (- 1) ((1) / (cos ^ (2) x + 3cos x + 3)) upto n terms then y '(0) =