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KCET2009MathematicsTrigonometric Ratios & Identities

Which one of the following is possible?

Options

  1. A= a²+b² a²-b² ,(a b)
  2. B= 4 5
  3. C=45
  4. D= 7 3

Correct answer

C. =45

Step-by-step solution

(a) Suppose a=2, b=1 = 2²+1² 2²-1 = 5 3 >1 , which is not possible. (b) = 4 5 1 , which is not possible. Hence, option (c) is correct.

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