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Algebra
Question

$$x \in [ 0,2 \pi ] ( KU / TI : 5$$ marks)
i) $$\cos ( x ) + \sqrt { 3 } = - \cos ( x )$$ ii) $$2 \sin ^ { 2 } ( x ) - 3 \sin ( x ) + 1 = 0$$
iii) $$( \sin \theta + 1 ) ^ { 2 } = ( \cos \theta ) ^ { 2 } \quad$$ iv $$) \tan ^ { 2 } ( x ) = 3$$