Discussion
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- Question
If a + b = 10 and ab = 21, then the value of (a - b)2 is
Options- A. 15
- B. 16
- C. 17
- D. 18
- Correct Answer
- 16
- 1. If cos 27° = x, the value of tan 63° is
Options- A. x1-x2
- B. x1+x2
- C. 1-x2x
- D. 1+x2x Discuss
- 2. If 2x+13x = 5 , the value of 5x6x2+20x+1 is
Options- A. 1/4
- B. 1/6
- C. 1/5
- D. 1/7 Discuss
- 3. If x , y, and z are real numbers such that (x - 3)2 + (y - 4)2 + (z - 5)2 = 0 then (x+y+z) is equal to
Options- A. -12
- B. 0
- C. 8
- D. 12 Discuss
- 4. The value of 2 Tan53°Cot37°-Cot80°Tan10° ?
Options- A. 3
- B. 2
- C. 1
- D. 0 Discuss
- 5. ? is a positive acute angle and sin? cos? = 0, then the value of sec? + cosec? is
Options- A. 2
- B. ?2
- C. 2?2
- D. 3?2 Discuss
- 6. If (x - 4) (x2 + 4x + 16) = x3 - P , then P is equal to
Options- A. 27
- B. 8
- C. 64
- D. 0 Discuss
- 7. If cos2x + cos4x = 1, then tan2x + tan4x =
Options- A. 0
- B. 1
- C. 2tanx
- D. tanx Discuss
- 8. If a + b + c = 0 , then the value of a3 + b3+ c3 is
Options- A. abc
- B. 2abc
- C. 3abc
- D. 0 Discuss
- 9. The value of x13+x-13x23-1+x-23
Options- A. x-1+x23
- B. x+x-13
- C. x13+x-1
- D. x+x-1 Discuss
- 10. If tan? = 43 , then the value of 3sin?+2cos?3sin?-2cos? ?
Options- A. 1/2
- B. 3/2
- C. 3
- D. -3 Discuss
Simplification problems
Search Results
Correct Answer: x1-x2
Correct Answer: 1/7
Correct Answer: 12
Correct Answer: 1
Correct Answer: 2?2
Correct Answer: 64
Correct Answer: 1
Correct Answer: 3abc
Correct Answer: x13+x-1
Correct Answer: 3
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