Question

If sin x + 2cos x =1 then prove that 2sin x - cos x = 2 and -2​

Answer 1

Step-by-step explanation:

As

sin - cos = 1

when

2 sin - cos = 2

and again when we reverse it

that is

2 cos - sin = -2

so we proved that

2 sin - cos = 2 and -2