1. If sin (x + 3α) = 3 sin (α - x), then tanx = ?
Ans: tan3α
2. If then, tanA, tanB, tanC are in ....
Ans: Geometric Progression.
3. If tan 25º = , then the value of is
Ans:
4. If
Ans:
5. If then is equal to
Ans:
6. The value of
Ans:
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 25º - sin 25º = P, then cos 50º is equal to
Ans:
10. Simplest form of
Ans:
11. If sin + cosec = 5 then sin2 + cosec2 is equal to
Ans: 23
12. The value of sin 50º - sin 70º + sin 10º is
Ans: 0
13. If and then
Ans:
14. If then
Ans: