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

  • A -0.2660
  • B -0.0266
  • C 0.0266
  • D 0.2660
  • E 1.5320
waec 1990mathematics

The correct answer is D. 0.2660

(cos 40° - sin 30°)

= 0.7660 - 0.5

= 0.2660

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