Questions asked by Nora

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• How do you solve the following? 6√1/6 - √2/3 the answer at the back of the book says 6√2, but I'm not sure how to get there.
  
• How do you solve roots and radical questions that have fractions underneath the radical sign? For example the following question: 1/2√4/3 - 2/3√3/4 + 2√1/12
  
• Find the exact value of: csc^2(17pi/4) How do I do problems with the sin, cos, tan...etc raised to the power of 2?
  
• Find the exact value of sin^3 3645° Do I go around the circle 10 times? is there an easier way to do this?
  
• If sinA=4/5 and cosB= -5/13, where A belongs to QI and B belongs to QIII, then find sin(A+B). How do you write the second half of the formula where cos becomes A and sin is B and how do the quadrants affect these?
  
• How much money should the department deposit at the end of each quarter in order to save enough to buy a new copy machine at the end of 5 years?