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Evaluate x and y from the given figure.
Without using trigonometric table, find the values of:
(i) sin 60° cos 30° + cos 60° sin 30°
(ii) sin 45° cos 30° - cos 45° sin 30°
(iii) cos 60° cos 45° + sin 60° sin 45°
(iv) cos 90° + cos2 45° sin 30° tan 45°
