Mathematics

Find the values of :

(i) 7 sin 30° cos 60°

(ii) 3 sin2 45° + 2 cos2 60°

(iii) cos2 45° + sin2 60° + sin2 30°

(iv) cos 90° + cos2 45° sin 30° tan 45°.

Trigonometrical Ratios

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