Question

cos(x)-sin(x)=sqrt(2)sin(x)
prove that: cos(x)+sin(x)=sqrt(2)cos(x)

Answer 1

is this the question
\[\cos(x)-\sin(x)= \sqrt2 sinx\]
prove
\[cosx+sinx = \sqrt2 cosx\]

Answer 2

Yes

Answer 3

Any specific way you need to prove?

Answer 4

No

Answer 5

I'm confused . That could be
\[\sqrt{2}sinx\]or
\[\sqrt{2sinx}\] :/

Answer 6

\[\sqrt{2} sinx\]

Answer 7

alright... there's got to be an identity we can use for this

Answer 8

don't no ... i'm also confused