Discussion
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- Question
If a + b = 9 and a2+ b2= 61 , then ab is
Options- A. 20
- B. 10
- C. 81
- D. 142
- Correct Answer
- 10
- 1. If cos 240° = x, then value of x is
Options- A. -1/?2
- B. -?3/2
- C. 1/2
- D. -1/2 Discuss
- 2. Simplify (b2x 3a2z4 ) × (b2x 4a4z3 )/(a3b2z4 )
Options- A. b2x7a3z3
- B. b3x7a3 z3
- C. b2x5a3 z3
- D. b2x7a3z2 Discuss
- 3. If 3x - 2(4 - 3x) < 2x - 5 < 3x + 3; then the value of x is
Options- A. 1
- B. 2
- C. 5
- D. 0 Discuss
- 4. Mayur can complete a work in 27 hours. If he is joined by Jayantika who is 100% more efficient, in what time will they together finish the work?
Options- A. 6 hours
- B. 3 hours
- C. 9 hours
- D. 10 hours Discuss
- 5. If cosec 45° - sin 30° = x, then x is
Options- A. 5/?3
- B. (?6-1)/?2
- C. ?3+2
- D. (2?2-1)/2 Discuss
- 6. Reflection of the point (2,5) in the x axis is
Options- A. (2,5)
- B. (-2,5)
- C. (2,-5)
- D. (-2,-5) Discuss
- 7. If 1/?(1+tan2A) = x , then value of x is
Options- A. cosA
- B. sinA
- C. cosecA
- D. secA Discuss
- 8. What is the equation of the line passing through the point (0,4) and making an angle of 45° with the positive xaxis?
Options- A. x + y = 4
- B. x - y = - 4
- C. x + y = -4
- D. x - y = 4 Discuss
- 9. What is the value of ?[(1 + sinA)/(1 - sinA)]?
Options- A. secA - tanA
- B. cosecA + tanA
- C. secA + tanA
- D. cosecA - tanA Discuss
- 10. The sum of 4x + 3y 7z, x y z and 2x 3y + 4z is
Options- A. 3x - y - 4z
- B. 3x - y + 4z
- C. 3x + y - 4z
- D. 3x + y + 4z Discuss
Simplification problems
Search Results
Correct Answer: -1/2
Correct Answer: b2x7a3z3
Correct Answer: 0
Correct Answer: 9 hours
Correct Answer: (2?2-1)/2
Correct Answer: (-2,-5)
Correct Answer: cosA
Correct Answer: x + y = -4
Correct Answer: secA + tanA
Correct Answer: 3x - y - 4z
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