zaeemsuperhero zaeemsuperhero

30-12-2020
Mathematics

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if cos θ - sin θ = √2 sin θ, then prove that cos θ + sin θ = √2 cos θ.

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ChoiSungHyun ChoiSungHyun

30-12-2020

Step-by-step explanation:

cos θ - sin θ = √2 sin θ

cos θ + sin θ = √2 sin θ + 2sin θ

cos θ + sin θ = √2(sin θ + √2sin θ)

cos θ + sin θ = √2 cos θ. (Proven)

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