Question

Find all solutions to the equation.

cos x = sin x

Answer 1

think of a right isosceles triangle... this should give a solution...

Answer 2

pi/4?

Answer 3

there you go... easy as pi

Answer 4

so which is it?

Answer 5

I'm confused now what should I do with that?

Answer 6

then i use unit circle?

Answer 7

\[\cos(x)=\sin(x) = \frac{ \sin(x) }{ \cos(x) } = \tan(x) = 0\]

Answer 8

pi/4+2npi,7pi/4+2npi
correct?

Answer 9

3pi/4+2npi,7pi/4+2pi?