Trigonometryeasy · Past Paper
Find the value of 1 - cos² 30°.
Asin² 30°
Bcos² 60°
C1/4
DBoth a and c
✓ Correct Answer: D — Both a and c
1 - cos² 30° = sin² 30°. Since sin 30° = 1/2, sin² 30° = 1/4.
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✓ Correct Answer: D — Both a and c
1 - cos² 30° = sin² 30°. Since sin 30° = 1/2, sin² 30° = 1/4.
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