Questions asked by mimi

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• `4sin(2x)=tanx`, solve for x (for `0<=x<=360`). I'm getting 7 answers, but only 4 answers are listed, and they are between `0` and `180`. Can somebody solve this?
  
• `sin(2x)=2cos(2x)-1`, solve for `x` (`0<=x<=180`). Can somebody please solve this?
  
• `2cos(3x)=2+sin(3x)`, solve for `x` (`0<=x<=180`). solve this please?
  
• "After showing that `2sectheta-tantheta=3` can be written as `sqrt10cos(theta-18.4)=2`, solve for `theta` (`0<theta<360`)". I proved the first part, can somebody please solve for `theta`?
  
• The angle `theta` satisfies `tan(2theta)=sintheta`. Show that either `sintheta=0` or `2costheta=2cos^2theta-1` (i did this). Hence find the smallest possible value of `theta`?
  
• Which quadrants should be considered when solving `cosx=(sqrt2)/4` for `0^@<=x<=360^@`, and why?