Discussion
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- Question
What is the simplest form of (1 + cosA)(cosecA cotA)?
Options- A. cosA
- B. tanA
- C. cotA
- D. sinA
- Correct Answer
- sinA
- 1. If sinC - sinD = x, then value of x is
Options- A. 2sin[(C+D)/2]cos[(C-D)/2]
- B. 2cos[(C+D)/2]cos[(C-D)/2]
- C. 2cos[(C+D)/2]sin[(C-D)/2]
- D. 2sin[(C+D)/2]sin[(D-C)/2] Discuss
- 2. What is the value of sin(11?/6)?
Options- A. 2/?3
- B. -2/?3
- C. -1/2
- D. 1/2 Discuss
- 3. The simplified form of (x + 3)2 + (x - 1)2 is
Options- A. (x2 + 2x + 5)
- B. 2(x2 + 2x + 5)
- C. (x2 - 2x + 5)
- D. 2(x2 - 2x + 5) Discuss
- 4. If a ? b = 11 and ab = 24, then value of a2 + b2 is
Options- A. 169
- B. 37
- C. 73
- D. 48 Discuss
- 5. P(4,2) and R(-2,0) are vertices of a rhombus PQRS. What is the equation of diagonal QS.
Options- A. x - 3y = -2
- B. 3x + y = 4
- C. 3x + y = -4
- D. x - 3y = 2 Discuss
- 6. What should be added to 3(x - 2y) to obtain 2(3x + y) - 5(2x + 3)?
Options- A. 8y - 7x - 15
- B. 8y - 7x + 15
- C. 8y + 7x + 15
- D. 8y + 7x - 15 Discuss
- 7. 2sinAsinB is equal to
Options- A. sin(A+B) + sin(A-B)
- B. cos(A-- cos(A+B)
- C. sin(A+B) - sin(A-B)
- D. cos(A+B) + cos(A-B) Discuss
- 8. For triangle PQR, what is the equation of altitude PS if coordinates of P, Q and R are (5,1), (0,4) and (2,3) respectively?
Options- A. 7x + 2y = 33
- B. 2x - 7y = 9
- C. 2x - 7y = -3
- D. 7x + 2y = -33 Discuss
- 9. If 51.97 (81.18 - x ) - 59.39 = 5.268, then value of x will be
Options- A. - 24.912
- B. - 68.492
- C. 93.868
- D. 197.808 Discuss
- 10. What is the value of sin -300°?
Options- A. 1
- B. ?3/2
- C. 1/2
- D. ?3/2 Discuss
Simplification problems
Search Results
Correct Answer: 2cos[(C+D)/2]sin[(C-D)/2]
Correct Answer: -1/2
Correct Answer: 2(x2 + 2x + 5)
Correct Answer: 169
Correct Answer: 3x + y = 4
Correct Answer: 8y - 7x - 15
Correct Answer: cos(A-- cos(A+B)
Correct Answer: 2x - 7y = 9
Correct Answer: 93.868
Correct Answer: ?3/2
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