Use mathematical table to evaluate (cos40° – sin30°)

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Mathematics WAEC 1990

Use mathematical table to evaluate (cos40° – sin30°)

  • -0.2660
  • -0.0266
  • 0.0266
  • 0.2660 checkmark
  • 1.5320

The correct answer is: D

Explanation

(cos 40° - sin 30°)

= 0.7660 - 0.5

= 0.2660

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