Question

find u and v where
sinu=2sinv and cosu+2cosv=2

Answer 1

try squaring the first one and then using the rule:\[\sin^2(x)=1-\cos^2(x)\]

Answer 2

sure, just managed it with cos2x=1-sin^2x
but it felt a bit over the top; thought there might be a better way

Answer 3

I think thats the right approach.

Answer 4

coool

Answer 5

thanks

Answer 6

yw