2 Simplify the followings as much as possible 2 cosxtanx Ic

(2) Simplify the followings as much as possible. (2) cos(-x)tan(-x) - I-cosx (10) Verify the followings. sec (x)(sin(x) + cos(x))-tan(x) 1 cos x csc x cot x cot(-x) tan x =-1 sin4 x + 2 sin, cos, x + cos\' x = 1 inx

Solution

cos²x/(1-cos²x)= cos²x/sin²x = cot²x

2. cos(-x) tan(-x) = -cos x tan x= -cos x(sin x/cos x) =-sin x