Question 47884
sinx = cos(x) .....on [0,2pi]
sin2x =.......on [0,2pi] 

0 and 2pi are radian measure 

The problem says "For what angles does the sin equal the cos? ; limit your 
solution to angles from 0 and 2pi radians".
The answer is pi/4 and (5/4)pi.

Cheers,
Stan H.