a) Sec²x(1-cos²x)=tan²x b) secx-cosx=sinx.tanx Sama caranya yaa bantuin Please:v

a) sec^2 x (1 - cos^2 x)
= [1/(cos^2 x] (sin^2 x)
= (sin^2 x)/(cos^2 x)
= Tan^2 x

b) sec x - cos x
= (1/(cos x)) - cos x
= (1 - cos^2 x)/(cos x)
= (sin^2 x)/(cos x)
= sin x . (sin x)/(cos x)
= sin x Tan x