Discussion
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- Question
What is the value of sin (90° + 2A)[4 ? cos2(90° ? 2A)]?
Options- A. 2(cos3 A ? sin3 A)
- B. 2(cos3 A + sin3 A)
- C. 4(cos6 A+ sin6 A)
- D. 4(cos6 A ? sin6 A)
- Correct Answer
- 4(cos6 A ? sin6 A)
- 1. What is the value of [2 sin (45 + ?) sin (45 ? ?)]/cos 2??
Options- A. 0
- B. tan 2?
- C. cot 2?
- D. 1 Discuss
- 2. What is the value of [(cos 3? + 2cos 5? + cos 7?)÷(cos ? + 2cos 3? + cos 5?)] + sin 2? tan 3??
Options- A. cos 2?
- B. sin 2?
- C. tan 2?
- D. cot ? sin 2? Discuss
- 3. What is the value of sin 75°+ sin 15° ?
Options- A. ?3
- B. 2?3
- C. ?(3/2)
- D. 3/?2 Discuss
- 4. What is the value of [1 ? sin (90 ? 2A)] / [1 + sin (90 + 2A)]?
Options- A. sinA cosA
- B. cot2A
- C. tan2A
- D. sin2A cosA Discuss
- 5. What is the value of [(cos 7A + cos 5A)÷(sin 7A ? sin 5A)]?
Options- A. tan A
- B. tan 4 A
- C. cot 4 A
- D. cot A Discuss
- 6. What is the value of [cos (90 + A)÷sec (270 ? A)] + [sin (270 + A)÷cosec (630 ? A)]?
Options- A. 3 sec A
- B. tan A sec A
- C. 0
- D. 1 Discuss
- 7. If sec2A cosec2A = x , then x is
Options- A. sec2A + cosec2A + 2
- B. tan2A + cot2A - 2
- C. tan2A + cot2A + 2
- D. sec2A + cosec2A - 2 Discuss
- 8. If sin ?/6 + sec ?/6 = x, then x is
Options- A. (2?2-1)/2
- B. 5/?3
- C. (?6-1)/?2
- D. (?3+4)/2?3 Discuss
- 9. Square of (3x ? 5xy) is
Options- A. 9x2 - 30x2y + 25x2y2
- B. 9x2 - 15x2y + 25x2y2
- C. 25x2 - 15x2y + 9x2y2
- D. 25x2 - 30x2y + 9x2y2 Discuss
- 10. If 5 - 2x ? 4 - x and 3(2 - x) > 2 - 4x; then x can take which of the following values?
Options- A. 3
- B. 2
- C. -3
- D. -5 Discuss
Simplification problems
Search Results
Correct Answer: 1
Correct Answer: cos 2?
Correct Answer: ?(3/2)
Correct Answer: tan2A
Correct Answer: cot A
Correct Answer: 1
Correct Answer: tan2A + cot2A + 2
Correct Answer: (?3+4)/2?3
Correct Answer: 9x2 - 30x2y + 25x2y2
Correct Answer: -3
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