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COMEDK2020MathematicsTrigonometric Ratios & Identities

² 175^ + ² 725^ is equal to

Options

  1. A² 45^
  2. B² 90^
  3. C² 45^
  4. D² 30^

Correct answer

A. ² 45^

Step-by-step solution

We have, ² 17.5^ + ² 72.5^ = ² 17.5^ + ² (90^ -72.5^ )= ² 175^ + ² 17.5^ =1= ² 45^

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