Answers edited by Tiago Hands

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• How do you convert -15 degrees to radians?
  
• How do you prove `[1 - cos(x)]/[sin(x)] = tan(x/2)`?
  
• What is the derivative of `4 / (x+3)`?
  
• What is the derivative of `ln(3x)`?
  
• Question #1e174
  
• What is the derivative of `tan^-1(x^2 y^5)`?
  
• How do you find the second derivative of `ln(x/(x^2+1))` ?
  
• How do you find the derivative of `f(x)= 2/(1+x^2)`?
  
• How do you graph `y = (1/2)sin(x - pi)`?
  
• What is the derivative of `ln(x/2)`?
  
• How do you differentiate `f(x)=(1+tan^2x)/secx`?
  
• How do you find the derivative of `x^3*arctan(7x)`?
  
• What is the difference in strength between the four fundamental forces?
  
• How do you prove `((1+cosx) / sinx) + (sinx / (1 + cosx)) = 2 csc x`?
  
• How do you prove `tan^2x/(Secx+1)+1 = secx`?
  
• What is the derivative of `f(x)= 5 secx tanx`?
  
• How do you solve `lnx+ln(x+4)=ln5`?
  
• How do you write 0.0064 as a fraction?
  
• How do you find the derivative using quotient rule and chain rule for `1/sqrt(1-x^2)`?
  
• What electric charge does a neutron have?
  
• What is the derivative of `y=ln(sec(x)+tan(x))`?
  
• How do you find the exact value of the trigonometric function cos 570 degrees?
  
• How do you simplify `\log_{5} ( b^{2} a^{8} )`?
  
• What is the derivative of `(arcsin(3x))/x`?
  
• How does gravity affect a star's life cycle?
  
• Just how big is the Universe?
  
• How do you prove `(cos^2x) / (sin^2x) * (1) / cos^2x = csc^2x`?
  
• What is the derivative of `y= ln(1-x^2)^(1/2)`?