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In Δ ABC, right-angled at B, AB 24 cm, BCDetermine (i) sin A, cos A (ii) sin C, cos7 cm.1. |
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Answer» In Δ ABC, right-angled at B Using Pythagoras theorem AC² = AB²+BC² AC² = 576 + 49 = 625 AC = √635 AC = ±25 Now (i)In a right angle triangle ABC where B=90° , Sin A = = 7/25 CosA = = 24/25 (ii) Sin C = = 24/25 Cos C = = 7/25 |
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