(Cos 65 - Cos 35) : (Sin 55 - Sin 35) ?
A. 1/2 root 3
B. 1/2 root 2
C -1
D 1
E 0
None of the above!
cos65 is less than cos35. sin55 is greater than sin35.
The result is therefore negative. However it isn't -1, the only negative option offered.
