#1) The student cancelled the n in the abbreviation of "Sine" like it was a variable in the equation. Instead of one over n times sine of x, they treated it like it was one over n times s times i times n times x. So then, they scooted the new one times s times i next to the x, to make one times six, which obviously equals six :]Originally Posted by mooglegirl608
#3) Peter just wrote the expression larger, expanding the size that it took up ;] Rather than carrying out the operation
People have explained #4 :]
#5, the girl confused infinity with a sideways 8, so instead of writing the real answer to the "limit of x as it approaches five in the expression 1 one x minus 5' or whatever, she wrote a sideways five.
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