Discussion
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- Question
A sphere of radius 5 cm is melted to form a cone with base of same radius. The height (in cm) of the cone is
Options- A. 5
- B. 10
- C. 20
- D. 22
- Correct Answer
- 20
- 1. If x3-2x=3x , then the value of x2+1x2 will be
Options- A. 3 1/9
- B. 3 2/9
- C. 2 1/9
- D. 2 4/9 Discuss
- 2. If a3+1a3 = 2, then the value of a2+1a ?
Options- A. 1
- B. 2
- C. 3
- D. 4 Discuss
- 3. If sin? x cos? = 1?2 . The value of sin? - cos? is where 0°< ?< 90°
Options- A. 0
- B. ?2
- C. 2
- D. 1 Discuss
- 4. If in a triangle ABC, Sin A = Cos B then the value of Cos C is
Options- A. ?3/2
- B. 0
- C. 1
- D. 1/?2 Discuss
- 5. If a = 2 , b = 3 then the value of 27a3 - 54a2b + 36ab2 - 8b3 is
Options- A. 1562
- B. 1616
- C. 1676
- D. 1728 Discuss
- 6. If ab = 21 and a+b2a-b2 = 254 ,then the value of a2+b2+3ab
Options- A. 115
- B. 121
- C. 125
- D. 127 Discuss
- 7. The value of ds+t÷ds÷dt
Options- A. 0
- B. d
- C. 1
- D. ds+t Discuss
- 8. If sec2?+tan2?=3, then sec4?-tan4? =
Options- A. 1/?3
- B. 1
- C. ?3
- D. 0 Discuss
- 9. Given a - b = 2, a3 - b3=26 then (a + b)2 is
Options- A. 9
- B. 4
- C. 16
- D. 12 Discuss
- 10. If X + Y + Z = 9 then the value of (X - 4)3 + (Y - 2)3 + (Z - 3)3 - 3 (X - 4) (Y - Z) (Z - 3) is
Options- A. 6
- B. 9
- C. 0
- D. 1 Discuss
Simplification problems
Search Results
Correct Answer: 2 4/9
Correct Answer: 2
Correct Answer: 0
Correct Answer: 0
Correct Answer: 1728
Correct Answer: 121
Correct Answer: 1
Correct Answer: ?3
Correct Answer: 16
Correct Answer: 0
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