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ACT MATH · Trigonometry Basics · Advanced

Trigonometry Basics: Solve math for math.

SOH-CAH-TOA, unit circle values.

Try the problem

Solve cos⁡x=0\cos x=0 for 0∘≤x<360∘0^\circ\le x<360^\circ.

Hint and answer

Concept to use

Inverse trig interpretation.

Hint

Find where the unit-circle xx coordinate is zero.

Answer

90°,270°

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