Use mathematical table to evaluate cos40 - sin30 - WAEC Mathematics 1990 Question
Use mathematical table to evaluate (cos40° - sin30°)
A
-0.2660
B
-0.0266
C
0.0266
D
0.2660
correct option: d
(cos 40° - sin 30°)
= 0.7660 - 0.5
= 0.2660
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