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Q1. Using a suitable identity, the value of (1 – cos2A) cosec2A is
2
1
0
-1
Q2. If A + B = 900, then, cosA.cosecB - cosA.sinB =
sin2 A
cos 2A
2 sin A
cos A2
Q3. The value of cos2 17o – sin2 73o is
1
0
3
-1
Q4. If 2 cos(A + B) = 1, and 2 sin(A –B) = 1 then the values of A and B are
45o, 15o
20o, 10o
30o, 45o
15o, 22o
Q5. The value of sin 60o cos 30o +cos 60o sin30o is
1
2
0
-2
Q6. If cos A + cos2 A = 1, then sin2 A + sin4 A is
-1
0
1
2
Q7. If a cot θ+ b cosec θ = p and b cot θ + a cosec θ= q then p2 - q2 is equal to
a2 - b2
b2 - a2
a2 + b2
b2 + a2
Q8. [cos4 A - sin4A] is equal to:
2 cos2 A + 1
2 cos2 A - 1
2 sin2 A - 1
2 sin2 A + 1
Q9. If A is an acute angle in a right triangle ABC, right angled at B, then value of sin A + cos A is.
1
not equal to 1
> 1
< 1
Q10. [(sec A + tan A) (1 - sin A)] on simplification gives:
tan2 A
sec2 A
cos A
sin A
Q11. If acos θ + bsin θ = 4 and asin θ - bcos θ = 3, then a2 + b2 is
7
12
25
None
Q12. Which of the following is defined?
tan 90°
cot 0°
cosec 90°
sec 90°
Q13. If x sin (90o - θ) cot (90o- θ) = cos (90o - θ) then x is
-1
1
2
0
Q14. If tan A = cot B, then A + B = ?
300
450
600
900
Q15. If cos 2x= cos 60o cos 30o + sin 60o sin 30o then x is equal to
15o
30o
60o
90o
Q16. The value of cos θ cos(90° - θ) - sin θ sin (90° - θ) is:
1
0
2
-1
Q17. If x = a cos θ and y = b sin θ then b2x2 + a2y2 is equal to
a2b2
ab
a4b4
a2 + b2
Q18. If A and B are the angles of a right angled triangle ABC, right angled at C, then 1 + cot2 A =
cos2 B
sec2 B
tan2 B
cot2 B
Q19. If tan 2A = cot (A - 18o), then the value of A is
18o
36o
24o
27o
Q20. If cos (40o + A) = sin 30o, the value of A is:
30o
40o
60o
20o

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