Discussion
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- Question
If 1/2 is added to a number and the sum is multipled by 3, the result is 21. Then the number is
Options- A. 6.5
- B. 5.5
- C. 4.5
- D. -6.5
- Correct Answer
- 6.5
- 1. If sin (3x 20°) = cos (3y + 20°), then find the value of (x + y).
Options- A. 90°
- B. 60°
- C. 120°
- D. 30° Discuss
- 2. If 3+12=x+3y, then the x+y is
Options- A. 2
- B. 4
- C. 6
- D. 8 Discuss
- 3. If a2+b2+c2=83 and a+b+c=15 then the value of ab+bc+ca is
Options- A. 69
- B. 70
- C. 71
- D. 72 Discuss
- 4. If tan A = 1/2 and tan B = 1/3, then what is the value of tan (2A + B)?
Options- A. 1
- B. 3
- C. 5
- D. 9 Discuss
- 5. What is the simplified value of cosec6A ? cot6A ? 3 cosec2A cot2A ?
Options- A. -2
- B. -1
- C. 0
- D. 1 Discuss
- 6. If P=9, Q= 17 then the value of p2-q2-13
Options- A. 4
- B. 1/4
- C. 3
- D. 1/3 Discuss
- 7. If ? and ? are roots of the equation 3x2 ? 13x + 14 = 0 , then what is the value of (?/?) + (?/?)?
Options- A. 65/28
- B. 53/14
- C. 9
- D. 85/42 Discuss
- 8. If a + b + c = 9 and ab + bc + ca = 18, then what is the value of a3 + b3 + c3 ? 3abc ?
Options- A. 189
- B. 243
- C. 361
- D. 486 Discuss
- 9. If 5x = 30-y = 6z , then what is the value of (xy + yz + zx)/xyz?
Options- A. 0
- B. 1
- C. 2
- D. 3 Discuss
- 10. If sec (3x ? 20°) = cosec (3y + 20°), then what is the value of tan (x + y)?
Options- A. 1
- B. ?3
- C. 1/?3
- D. 2?3 Discuss
Simplification problems
Search Results
Correct Answer: 30°
Correct Answer: 6
Correct Answer: 71
Correct Answer: 3
Correct Answer: 1
Correct Answer: 1/4
Correct Answer: 85/42
Correct Answer: 243
Correct Answer: 0
Correct Answer: 1/?3
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