If cosϴ- sinϴ =√2sinϴ,prove that cosϴ+ sinϴ=√2cosϴ - Maths - Introduction to Trigonometry

Question

If cosϴ- sinϴ =√2sinϴ,prove that
cosϴ+ sinϴ=√2cosϴ

Abhishek Kr. Jha · Accepted Answer

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If cosϴ- sinϴ.=√2sinϴ,prove that cosϴ+ sinϴ=√2cosϴ