If ???? (x) = | cos (2x) cos (2x) sin (2x) |
| - cos x cos x - sin x | , then
| sin x sin x cos z |
[A] ????'(x) = 0 at exactly three points in (-????, ????) [B] ????'(x) = 0 at more than three points in (-????, ????)
[C] ????(x) attains its maximum at x = 0 [D] ????(x) attains its minimum at x = 0
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idk
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