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KCET2007MathematicsTrigonometric Ratios & Identities

² 17.5^ + ² 72.5^ is equal to

Options

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

Correct answer

B. ² 45^

Step-by-step solution

We have, ² 17.5^ + ² 72.5^ aligned &= ² 17.5^ + ² (90^ -17.5^ ) &= ² 17.5^ + ² 17.5^ &=1=1²= ² 45^ aligned

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