Trigonometryhard · Past Paper
If x = a cos θ and y = b sin θ, find (x²/a² + y²/b²).
A0
B1
C2
Dab
✓ Correct Answer: B — 1
x/a = cos θ, y/b = sin θ. Squaring and adding gives cos²θ + sin²θ = 1.
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