Question

If
✍2cos θ –sin θ = x
and
✍cos θ – 3 sin θ =y.
Prove that
✍2x² + y² −2xy

No irelvant answer❌❌❌
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Answer 1

Answer:

If

✍2cos θ –sin θ = x

and

✍cos θ – 3 sin θ =y.

Prove that

✍2x² + y² −2xy