In Exercises 1 - 4, write the expression as a trigonometric function of only , and use

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In Exercises 1 - 4, write the expression as a trigonometric function of only Θ, and use a graphing utility to confirm your answer graphically.
1. cos(3π / 2 - Θ)
2. sin(π + Θ)
3. csc(3π / 2 + Θ)
4. cot(Θ π)
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