Cos x . Csc x . Tan x Cos x . Cot x + sin x Sin x : 1+cos x + sin x : 1-cos x

[tex]cos x.csc x.tan x = cos x. \frac{1}{sin x}. \frac{sinx}{cos x} = \frac{cos x}{cos x} = 1 [/tex]

[tex]cos x.cot x+sin x = cos x. \frac{1}{tan x} +sin x = cosx . \frac{cos x}{sin x} + sin x [/tex]
[tex]\frac{cos^{2}x}{sin x} = -sin x[/tex]
[tex]cos^{2}x=-sinx.sinx = -sin^{2}x[/tex]