alleryStart learning →Removing two full turns, cos 930° reduces to
A−√3 / 2
B√3 / 2
C−1 / 2
D1 / 2
Answer & Solution
Correct answer: A. −√3 / 2
930° = 2 × 360° + 210°, and cos210° = −cos30° = −√3/2.
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