Trigonometrymedium · Past Paper
If tan A = 4/3, what is the value of (1-sin A)/(1+sin A)?
A1/9
B1/3
C4/9
D1/2
✓ Correct Answer: A — 1/9
tan A = 4/3 implies p=4, b=3, h=5. sin A = 4/5. (1-4/5)/(1+4/5) = (1/5)/(9/5) = 1/9.
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