Use mathematical table to evaluate (cos40^\circ - sin30^\circ)
A
-0.2660
B
-0.0266
C
0.0266
D
0.2660
E
1.5320
Verified Correct Answer: D.
Step-by-Step Mathematical Solution
(cos 40^\circ - sin 30^\circ)
= 0.7660 - 0.5
= 0.2660
Source: Myschool Past Questions Archive (Record #22691)