\\Delta{ABC} is a right-angled triangle, where \\angle{ABC}=90^\circ. If {AC}= 2 \\sqrt{5} and {AB}-{AC}=2, then the value of \cos ^{2} {\A}-\cos ^{2} {C} is

CDS Model Paper 4 Mathematics

Question : 91 of 100

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ΔABC is a right-angled triangle, where ∠ABC=90°. If AC= 2√5 and AB−AC=2, then the value of cos2A−cos2C is

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