Answered

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25) Find an angle x where sin x = cos X.

Sagot :

Answer: 45 degrees or pi/4 radians

Explanation:

I recommend using the unit circle for this. You're looking for a point (x,y) on the unit circle such that x = y.

In the first quadrant Q1, this happens when theta = 45 degrees = pi/4 radians.

Another instance is in Q3 when theta = 225 degrees = 5pi/4 radians.

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