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AP Precalculus/Unit 3: Trigonometric and Polar Functions
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Cosine to Sine Function Conversion
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The function $$h(\theta) = 4\cos(3(\theta + \frac{\pi}{4})) - 5$$ is equivalent to which of the following sine functions?

A

$$h(\theta) = 4\sin(3\theta + \frac{5\pi}{4}) - 5$$

B

$$h(\theta) = 4\sin(3\theta + \frac{3\pi}{4}) - 5$$

C

$$h(\theta) = 4\sin(3(\theta + \frac{\pi}{4}) + \frac{\pi}{2}) - 5$$

D

$$h(\theta) = 4\sin(3(\theta + \frac{\pi}{4}) - \frac{\pi}{2}) - 5$$

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