Question

prove that sin^3 + cos^2 = 1​

Answer 1

Step-by-step explanation:

Prove the equation sin2θ+cos2θ=1.

We will also keep in mind that PH=sinθ, BH=cosθ. Where, P stands for perpendicular, H stands for hypotenuse and B stands for base. Complete step-by-step answer: ... Do not forget that PH=sinθ,BH=cosθ,PB=tanθ.

Answer 2

Answer:

Explanation:

sin2xcos2x+3cosx+2

⇒1−cos2xcos2x+cosx+2cosx+2

⇒(1+cosx)⋅(1−cosx)cosx(cosx+1)+2⋅(cosx+1)

⇒(1+cosx)⋅(1−cosx)(cosx+1)(cosx+2)

⇒1−cosx2+cosx=RHS