Solution of Trigonometric Equations (VCE SSCE Mathematical Methods): Quizzes

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Solution of Trigonometric Equations
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In which quadrants are solutions found when sin⁡θ\sin \theta is positive?

1st and 2nd quadrants

In which quadrants are solutions found when cos⁡x\cos x is negative?

2nd and 3rd quadrants

What is the reference angle?

The acute angle in the 1st quadrant

Which symmetry property helps find 2nd quadrant solutions for sin⁡θ\sin \theta?

sin⁡(π−θ)=sin⁡θ\sin(\pi - \theta) = \sin \theta

What is the period of the sine and cosine functions?

2π2\pi

If θ∈[0,π]\theta \in [0, \pi] and x=2θx = 2\theta, what is the interval for xx?

[0,2π][0, 2\pi]

After solving sin⁡(3t)=0.5\sin(3t) = 0.5 for x=3tx = 3t, how do you find tt?

Divide all xx solutions by 3

What must you check before solving trig equations on a calculator?

Whether it's in degree or radian mode

For sin⁡x=−0.3\sin x = -0.3 with ref angle 0.305, what is the 3rd quadrant solution?

π+0.305\pi + 0.305

How many solutions exist for sin⁡θ=12\sin \theta = \frac{1}{2} in [0,4π][0, 4\pi]?

Four solutions

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