Discussion
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- Question
If cosC + cosD = x, then value of x is
Options- A. 2cos[(C+D)/2]cos[(C-D)/2]
- B. 2sin[(C+D)/2]sin[(C-D)/2]
- C. 2cos[(C+D)/2]sin[(C-D)/2]
- D. 2sin[(C+D)/2]cos[(C-D)/2]
- Correct Answer
- 2cos[(C+D)/2]cos[(C-D)/2]
- 1. If x + y = 12 and xy = 32, then what is the value of x2 + y2 ?
Options- A. 24
- B. 144
- C. 128
- D. 80 Discuss
- 2. If 2x + 3(5-2x) > 2 - 3x < 2x - x/3, then x can take which of the following values?
Options- A. 0
- B. -2
- C. -4
- D. 2 Discuss
- 3. A line passing through the origin perpendicularly cuts the line 2x + 3y = 6 at point M. Find M?
Options- A. (6/11, 9/11)
- B. (6/7, 9/7)
- C. (6/11, -9/11)
- D. (-6/7, 9/7) Discuss
- 4. Find co-ordinates of the mid point of the segment joining points C (3,-5) and D (-7,3).
Options- A. (-2, -1)
- B. (5, -4)
- C. (-5, 4)
- D. (2, 1) Discuss
- 5. If sinC + sinD =X, then the value of X is?
Options- A. 2cos[(C+D)/2]sin[(C-D)/2]
- B. 2sin[(C+D)/2]cos[(C-D)/2]
- C. 2cos[(C+D)/2]cos[(C-D)/2]
- D. 2sin[(C+D)/2]sin[(D-C)/2] Discuss
- 6. What is the value of cosec -150°?
Options- A. -2
- B. 2/?3
- C. 2
- D. -2/?3 Discuss
- 7. If tanA - cotA = x, then value of x is?
Options- A. (1 + 2cos2A)/(sinA cosA)
- B. (sinA cosA)/(1 - 2cos2A)
- C. (sinA cosA)/(1 + 2cos2A)
- D. (1 - 2cos2A)/(sinA cosA) Discuss
- 8. Directions: What value should come in place of question mark (?) in the following question? 69÷3×0.85+24.5-13.8=?
Options- A. 31.75
- B. 30.25
- C. 28.95
- D. 35.25 Discuss
- 9. Direction: What value should come in place of the question mark (?) in the following question? 534.596 + 61.472 - 496.708 = ? + 27.271
Options- A. 126.631
- B. 62.069
- C. 72.089
- D. 132.788 Discuss
- 10. Direction: What will come in place of the question mark (?) in the following question? 504÷42x7-63+28 = ?
Options- A. 72
- B. 48
- C. 62
- D. 38 Discuss
Simplification problems
Search Results
Correct Answer: 80
Correct Answer: 2
Correct Answer: (6/11, 9/11)
Correct Answer: (-2, -1)
Correct Answer: 2sin[(C+D)/2]cos[(C-D)/2]
Correct Answer: -2
Correct Answer: (1 - 2cos2A)/(sinA cosA)
Correct Answer: 30.25
Explanation:
= (69x85/3x100) + 10.7
= 30.25.
Correct Answer: 72.089
Explanation:
534.596 + 61.472 ? 496.708 = ? + 27.271
596.068 ? 496.708 = ? + 27.271
? = 99.36 ? 27.271
? = 72.089.
Correct Answer:
Explanation:
504/42 × 7 - 63 + 28 = 84 ? 63 + 28 = 49
Hence option 5 is correct.
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