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Simplification
If tan θ + cot θ = x, then what is the value of tan4θ + cot4θ ?
(x3 – 3)2 + 2
(x4 – 2x) + 4
x2 (x2 – 4) + 2
x
Correct Answer:
x2 (x2 – 4) + 2
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