Discussion
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- Question
What is the value of the expression a3 - 5 + 2816a , when a = 2?
Options- A. 2
- B. 5
- C. 7
- D. 8
- Correct Answer
- 7
- 1. What is the value of sec2? + 1sec2? - 1 x 12cot? - tan? ?
Options- A. 0
- B. 1
- C. cosec ?
- D. sec ? Discuss
- 2. A tower stands on the top of a building which is 40 metres high. The angle of depression of a point situated on the ground from the top and bottom of the tower are found to be 60 and 45 deg respectively. What is the height (in metres) of tower?
Options- A. 20?3
- B. 30(?3 + 1)
- C. 40(?3 ? 1)
- D. 50(?3 ? 1) Discuss
- 3. What is the value of cos (90 ? B) sin (C ? A) + sin (90 + A) cos (B + C) ? sin (90 ? C) cos (A + B)?
Options- A. 1
- B. sin ( A + B ? C)
- C. cos ( B + C ? A)
- D. 0 Discuss
- 4. What is the value of [(sin 59° cos 31° + cos 59° sin 31° )÷(cos 20° cos 25° ? sin 20° sin 25° )]?
Options- A. 1/?2
- B. 2?2
- C. ?3
- D. ?2 Discuss
- 5. What is the value of sin (630 + A) + cos A?
Options- A. ?3/2
- B. 1/2
- C. 0
- D. 2/?3 Discuss
- 6. Sumit and Amit undertook a work for Rs 7200. Sumit alone can do the work in 5 days and Amit alone can do the work in 4 days. If they work together,then what will be the difference (in Rs.) in the amount they receive?
Options- A. 800
- B. 1600
- C. 1200
- D. 1400 Discuss
- 7. What is the value of ( 1/3 - cot60°) ?
Options- A. (2-?3)/2?3
- B. (?2-1)/?2
- C. (1-?3)/3
- D. (?3-4)/2?3 Discuss
- 8. ? XYZ is right angled at Y. If tanX = 15/8, then what is the value of sinZ ?
Options- A. 15/17
- B. 17/8
- C. 17/15
- D. 8/17 Discuss
- 9. If cot(A/2) = x, then the value of x is
Options- A. ?[(1 + cosA)/(1 - cosA)]
- B. cosecA - cotA
- C. ?[(1 - cosA)/2]
- D. ?[(1 + cosA)/2] Discuss
- 10. If (1 - cosA)/(1 + cosA) = x, then the value of x is
Options- A. (cotA + cosecA)2
- B. (cotA - cosecA)2
- C. cotA - cosecA
- D. cotA + cosecA Discuss
Simplification problems
Search Results
Correct Answer: 1
Correct Answer: 40(?3 ? 1)
Correct Answer: 0
Correct Answer: ?2
Correct Answer: 0
Correct Answer: 800
Correct Answer: (1-?3)/3
Correct Answer: 8/17
Correct Answer: ?[(1 + cosA)/(1 - cosA)]
Correct Answer: (cotA - cosecA)2
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