Trigonometryhard · Past Paper
What is the value of tan 9° - tan 27° - tan 63° + tan 81°?
A1
B2
C4
D0
✓ Correct Answer: C — 4
Grouping (9, 81) and (27, 63) as tan+cot pairs results in 4.
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✓ Correct Answer: C — 4
Grouping (9, 81) and (27, 63) as tan+cot pairs results in 4.
Share this question