Question

If 2cos theta -sin theta =x and costheta- 3 sin theta =y then prove that 2x ​ 2 + y 2 -2xy=5. thank you.

Answer 1

sin^2a + cos^2a = 1 .
put values of this and we get answer

Answer 2

Answer:

Step-by-step explanation

I will hope that it will help you

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