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With x = r cos t and y = r sin t, r = 5, which point lies at t = 90 degrees?
A(-5, 0)
B(5, 0)
C(0, 5)
D(0, -5)
Answer & Solution
Correct answer: C. (0, 5)
At 90 degrees cosine is 0 and sine is 1, giving (0, 5).
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