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- Question
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)
- Correct Answer
- cos(A-- cos(A+B)
- 1. 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
- 2. What is the simplest form of (1 + cosA)(cosecA cotA)?
Options- A. cosA
- B. tanA
- C. cotA
- D. sinA Discuss
- 3. 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
- 4. What is the value of sin(11?/6)?
Options- A. 2/?3
- B. -2/?3
- C. -1/2
- D. 1/2 Discuss
- 5. 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
- 6. 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
- 7. 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
- 8. What is the value of sin -300°?
Options- A. 1
- B. ?3/2
- C. 1/2
- D. ?3/2 Discuss
- 9. If 2(3x + 5) > 4x - 5 < 3x + 2; then x can take which of the following values?
Options- A. 8
- B. 6
- C. -8
- D. -10 Discuss
- 10. If (4x - 5) = (3x - 1), then the numerical value of (x + 4)2
Options- A. 16
- B. 64
- C. 32
- D. 8 Discuss
Simplification problems
Search Results
Correct Answer: 8y - 7x - 15
Correct Answer: sinA
Correct Answer: 2cos[(C+D)/2]sin[(C-D)/2]
Correct Answer: -1/2
Correct Answer: 2(x2 + 2x + 5)
Correct Answer: 2x - 7y = 9
Correct Answer: 93.868
Correct Answer: ?3/2
Correct Answer: 6
Correct Answer: 64
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