Discussion
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- Question
If x=aCos?Cos?, y = aCos?Sin? and z= aSin?, then the value of x2+ y2 + z2 is
Options- A. 2a2
- B. 0
- C. 4a2
- D. a2
- Correct Answer
- a2
- 1. The value of sec217°-1tan273°-sin17°sec73°
Options- A. 1
- B. 0
- C. -1
- D. 2 Discuss
- 2. If xa+b+1=xa-b+a-ba+b , then x is equal to
Options- A. 2a-b
- B. a+b
- C. a-b
- D. 2a+b Discuss
- 3. If a-b=1 and a3-b3 = 61 , then the value of ab will be
Options- A. -20
- B. 20
- C. 30
- D. 60 Discuss
- 4. If p = 99, then the value of p(p2+3p+3) will be
Options- A. 999999
- B. 1000000
- C. 1000001
- D. 999998 Discuss
- 5. If the simple interest on Rs. 1 for 1 month is 1 paisa, then the rate percent per annum will be
Options- A. 10%
- B. 8%
- C. 12%
- D. 6% Discuss
- 6. A 1.6 m tall observer is 45 meters away from a tower. The angle of elevation from his eye to the top of the tower is 30°, then the height of the tower in meters is
Options- A. 25.98
- B. 26.58
- C. 27.58
- D. 27.98 Discuss
- 7. A spherical lead ball of radius 6 cm is melted and small lead balls of radius 3 mm are made. The total number of possible small lead balls is
Options- A. 4250
- B. 4000
- C. 8005
- D. 8000 Discuss
- 8. If x2+5x+6 = 0 , then the value of 2xx2-7x+6 is
Options- A. 1/6
- B. 1/3
- C. -1/6
- D. -1/3 Discuss
- 9. If a+b=5 and ab=3, then the value of (a2+b2) is
Options- A. 17
- B. 18
- C. 19
- D. 20 Discuss
- 10. A 8 cm long perpendicular is drawn from the centre of a circle to a 12 cm long chord. The diameter of the circle is
Options- A. 10 cm
- B. 12 cm
- C. 16 cm
- D. 20 cm Discuss
Simplification problems
Search Results
Correct Answer: 0
Correct Answer: a-b
Correct Answer: 20
Correct Answer: 999999
Correct Answer: 12%
Correct Answer: 27.58
Correct Answer: 8000
Correct Answer: -1/6
Correct Answer: 17
Correct Answer: 20 cm
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