Trigonometrymedium · Past Paper
Evaluate: tan 1 * tan 2 * tan 3 ... tan 89
A0
B1
C89
DUndefined
✓ Correct Answer: B — 1
tan(90-x) = cot x. Pairing tan 1 with tan 89 gives 1, tan 2 with tan 88 gives 1, and tan 45 = 1.
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