Question

Express sin 2theta + cos 2theta as product of sin and cos

Answer 1

Answer:

Prove :

sin2(θ)+cos4(θ)=cos2(θ)+sin4(θ)

we only know how to solve using factoring and the basic trig identities, I

we do not know reduction or anything of the sort, please prove using the basic trigonometric identities and factoring.

After some help I found that you move the identity around, so:

sin2(θ)−cos2(θ)=sin4(θ)−cos4(θ)

Then,

sin2(θ)−cos2(θ)=(sin2(θ)+cos2(θ))(sin2(θ)−cos2(θ))

Answer 2

Answer:

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