Question

An angle, θ, is in standard position. The terminal side of the angle passes through the point (4, 5).

Find cosθ.

Answer 1

draw a diagram

then use pythagoras to find c

then you can find co(x)

Answer 2

How do you do that?

Answer 3

pythagoras 's theorem is

\[c^2 = a^2 + b^2\]