Trigonometryhard · Past Paper
The value of (sec θ + tan θ - 1)(sec θ - tan θ + 1) is:
A2 tan θ
B2 sec θ
C0
D1
✓ Correct Answer: A — 2 tan θ
Expansion and simplification using sec²-tan²=1 results in 2 tan θ.
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