Trigonometrymedium · Past Paper
What is (sec θ - tan θ)(sec θ + tan θ)?
A0
B-1
C1
D2
✓ Correct Answer: C — 1
Difference of squares: sec²θ - tan²θ = 1.
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✓ Correct Answer: C — 1
Difference of squares: sec²θ - tan²θ = 1.
Share this question