Example3|Trigonometry|Class X|Consider ∆ ACB, right-angled at C, in which AB = 29 units, BC = 2units

Example3|Trigonometry|Class X|Consider ∆ ACB, right-angled at C, in which AB = 29 units, BC = 21 units and∠ ABC = θ (see Fig. 8.10). Determine the values of(i) cos2 θ + sin2 θ,(ii) cos2 θ – sin2 θ.

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