Discussion
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- Question
If ? + ? = 90° and ?:? = 2:1, then the ratio of cos? to cos? is
Options- A. 1:?3
- B. 1:3
- C. 1:?2
- D. 1:2
- Correct Answer
- 1:?3
- 1. If (x + 1/x) = 3, then x8+1x8 is equal to
Options- A. 2201
- B. 2203
- C. 2207
- D. 2213 Discuss
- 2. If ( x - 5)2 + (y - 2)2 + (z - 9)2 = 0 , then value of (x + y - z) is
Options- A. 16
- B. -1
- C. -2
- D. 12 Discuss
- 3. If cos 21° = x/y, then cosec 21° - cos 69° is equal to
Options- A. x2yy2-x2
- B. y2xy2-x2
- C. y2xx2-y2
- D. x2yx2-y2 Discuss
- 4. If x + ?5 = 5 + ?y, and x, y are positive integers, then the value of x+yx + y
Options- A. 1
- B. 2
- C. ?5
- D. 5 Discuss
- 5. The least value of tan2x + cot2x is
Options- A. 3
- B. 2
- C. 0
- D. 1 Discuss
- 6. If x = 999, y = 1000, z = 1001, then the value of x3+y3+z3-3xyzx-y+z is
Options- A. 1000
- B. 9000
- C. 1
- D. 9 Discuss
- 7. If a1-2a+b1-2b+c1-2c = 12, then 11-2a+11-2b+11-2c value is
Options- A. 1
- B. 2
- C. 3
- D. 4 Discuss
- 8. The length of a chord which is at a distance of 12 cm from the centre of a circle of radius 13 cm is
Options- A. 10 cm
- B. 5 cm
- C. 6 cm
- D. 12 cm Discuss
- 9. If ? is positive acute angle and 7cos2? + 3sin2? = 4 , then the value of ? is
Options- A. 60°
- B. 30°
- C. 45°
- D. 90° Discuss
- 10. If x = 313- 3-13, then 3x3 + 9x value is
Options- A. 8
- B. 9
- C. 27
- D. 16 Discuss
Simplification problems
Search Results
Correct Answer: 2207
Correct Answer: -2
Correct Answer: x2yy2-x2
Correct Answer: 1
Correct Answer: 2
Correct Answer: 9
Correct Answer: 4
Correct Answer: 10 cm
Correct Answer: 60°
Correct Answer: 8
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