Posted by elena on .
Compare the graphs
f(è)=sinè and f(è)=sin(è).
f(è)=cosè and f(è)=cos(è).
What conclusions can you make?

MathsHelp needed!!! 
elena,
e = theta :(

MathsHelp needed!!! 
bobpursley,
sine is an odd function.
cosine is an even function.
Look at the symmetry around Theta=0