1. If sin (x + 3
) = 3 sin ( - x), then tanx = ?
Ans: tan3
2. If 
then, tanA, tanB, tanC are in ....
Ans: Geometric Progression.
3. If tan 25° =
, then the value of 
is
Ans: 
4. If 
Ans: 3/4
5. If 
then
is equal to
Ans: 
6. The value of 
Ans: 3/2
7. cos2(A - B) + cos2B - 2 cos(A -B) cosA cosB is equal to
Ans: sin2A
8. If
then 
is equal to
Ans: 
9. If cos 25° - sin 25° = P, then cos 50° is equal to
Ans: 
10. Simplest form of 
Ans: sec x/2
11. If sin
+ cosec = 5 then sin2 + cosec2 is equal to
Ans: 23
12. The value of sin 50° - sin 70° + sin 10° is
Ans: 0
13. If
and then 
Ans: 
14. If 
then 
Ans: a/b
