1. If sin (x + 3
) = 3 sin (
- x), then tanx = ?
Ans: tan3α
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 sinθ + cosecθ = 5 then sin2θ + cosec2θ is equal to
Ans: 23
12. The value of sin 50° - sin 70° + sin 10° is
Ans: 0
13. If 
and then 
Ans: π/4
14. If 
then 
Ans: a/b
