12. The value of sin^2 30° -cos^2 30° is
(a)-1/2
(b)✓3/2
(c)3/2
(d)2/3
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Answer:
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Answer:
(a)-1/2
Step-by-step explanation:
sin²30° - cos²30°
= - [cos²30°-sin²30°]
= - cos 2(30)°
= - cos 60°
= - 1/2
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