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Trigonometric Equations

15 practice questionsA-Level MathematicsStep-by-step solutions

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1

Solve cos⁡x=12\cos x = \dfrac{1}{2} for 0≤x<2π0 \le x < 2\pi.

A.x=π3x = \frac{\pi}{3}
B.x=4π3, 2π3x = \frac{4 \pi}{3},\ \frac{2 \pi}{3}
C.x=π3, 5π3x = \frac{\pi}{3},\ \frac{5 \pi}{3}
D.x=π3, 5π4, 5π3x = \frac{\pi}{3},\ \frac{5 \pi}{4},\ \frac{5 \pi}{3}
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2

Solve sin⁡x=0\sin x = 0 for 0≤x<2π0 \le x < 2\pi.

A.x=0, πx = 0,\ \pi
B.x=0, π4, πx = 0,\ \frac{\pi}{4},\ \pi
C.x=π2, 3π2x = \frac{\pi}{2},\ \frac{3 \pi}{2}
D.x=0x = 0
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3

Solve sin⁡x=1\sin x = 1 for 0≤x<2π0 \le x < 2\pi.

A.x=3π2x = \frac{3 \pi}{2}
B.x=π2, 3π2x = \frac{\pi}{2},\ \frac{3 \pi}{2}
C.x=π2, 5π6x = \frac{\pi}{2},\ \frac{5 \pi}{6}
D.x=π2x = \frac{\pi}{2}
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