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Find the magnitude of angle A, if: (i) 2 sin A cos A - cos ssA - 2sin A + 1 = 0 (ii) tan A - 2 cos A anA + 2cos A - 1 = 0 (iii) 2cos^2 A - 3co A + 1 = 0 (iv) 2 tan 3A cos 3A - tan n 3A+1=2 cos 3A​

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