Use mathematical table to evaluate (cos40° – sin30°)
-
A.
-0.2660 -
B.
-0.0266 -
C.
0.0266 -
D.
0.2660 -
E.
1.5320
Correct Answer: Option D
Explanation
(cos 40° – sin 30°)
= 0.7660 – 0.5
= 0.2660
Use mathematical table to evaluate (cos40° – sin30°)
(cos 40° – sin 30°)
= 0.7660 – 0.5
= 0.2660