Let,

EQ.1 y = cos x EQ.2 y = sin x

Solve the intersection points between the two equations.

`y = y`

`sin x = cos x`

Divide both sides by cos x.

`(sin x)/(cosx) = 1`

`tan x = 1`

Refer to Unit Circle Chart or Table of Trigonometric Function for Special Angle to determine the value of x.

So at the interval `0<=x<=2pi` values of x are,

`x = pi/4 and (5pi)/4`

(The entire section contains 216 words.)

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