In the given figure, ACB = 900 , BDC = 900 , CD = 4 cm, BD = 3 cm, AC = 12 cm, then the value of cos A – sin A is equal to
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In the given figure, ACB = 900 , BDC = 900 , CD = 4 cm, BD = 3 cm, AC = 12 cm, then the value of cos A – sin A is equal to
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