### Related

##### cos-trigsimp

trigsimp((1+cos(w*t))...

Calculate

##### cos-trigsimp

trigsimp(cos(a)*cos(b...

Calculate

##### cos-trigsimp

trigsimp( (cos(x)-1 /...

Calculate

##### cos-trigsimp

trigsimp(cos(x)+cos(y));

Calculate

##### cos-trigsimp

trigsimp((cos(a)*cos(...

Calculate

##### cos-trigsimp

trigsimp((1+cos(a)+%i...

Calculate

##### cos-trigsimp

trigsimp(cos(pi/2));

Calculate

##### cos-trigsimp

trigsimp((A+cos(w*t))...

Calculate

##### cos-trigsimp

trigsimp((1-(cos(x))/...

Calculate

##### cos-trigsimp

trigsimp(cos(%pi/2-x));

Calculate

### [cos,trigsimp]

Run Example
(%i1)trigsimp((cos(a)*cos(b)*cos(c)*cos(d) + cos(a)*cos(e)*cos(c)*cos(f) + cos(b)*cos(d)));
(%o1) cos(a) cos(c) cos(e) cos(f) + (cos(a) cos(b) cos(c) + cos(b)) cos(d)
(%i2)
Run Example
trigsimp(cos(pi/4));
pi
(%o1)                               cos(--)
4
(%i2)
Run Example
trigsimp(cos(pi/2));
pi
(%o1)                               cos(--)
2
(%i2)

### Related Help

Help for Cos

Help for Trigsimp