Enter a problem...
Trigonometry Examples
Popular Problems
Trigonometry
Simplify cos(7x)cos(4x)-sin(7x)sin(4x)
Step 1
Nothing further can be done with this topic. Please check the
expression
entered or try another topic.
Please ensure that your password is at least 8 characters and contains each of the following:
a number
a letter
a special character: @$#!%*?&