Mister Exam

Other calculators

Least common denominator sin(k*x+x/2)/2*sin(x/2)+cos(k*x+x)

An expression to simplify:

The solution

You have entered [src]
   /      x\                      
sin|k*x + -|                      
   \      2/    /x\               
------------*sin|-| + cos(k*x + x)
     2          \2/               
$$\frac{\sin{\left(k x + \frac{x}{2} \right)}}{2} \sin{\left(\frac{x}{2} \right)} + \cos{\left(k x + x \right)}$$
(sin(k*x + x/2)/2)*sin(x/2) + cos(k*x + x)
General simplification [src]
cos(k*x)   3*cos(x*(1 + k))
-------- + ----------------
   4              4        
$$\frac{\cos{\left(k x \right)}}{4} + \frac{3 \cos{\left(x \left(k + 1\right) \right)}}{4}$$
cos(k*x)/4 + 3*cos(x*(1 + k))/4
Rational denominator [src]
                    /x\    /      x\
2*cos(x + k*x) + sin|-|*sin|k*x + -|
                    \2/    \      2/
------------------------------------
                 2                  
$$\frac{\sin{\left(\frac{x}{2} \right)} \sin{\left(k x + \frac{x}{2} \right)} + 2 \cos{\left(k x + x \right)}}{2}$$
(2*cos(x + k*x) + sin(x/2)*sin(k*x + x/2))/2
Assemble expression [src]
   /x\    /      x\               
sin|-|*sin|k*x + -|               
   \2/    \      2/               
------------------- + cos(k*x + x)
         2                        
$$\frac{\sin{\left(\frac{x}{2} \right)} \sin{\left(k x + \frac{x}{2} \right)}}{2} + \cos{\left(k x + x \right)}$$
sin(x/2)*sin(k*x + x/2)/2 + cos(k*x + x)
Numerical answer [src]
0.5*sin(x/2)*sin(k*x + x/2) + cos(k*x + x)
0.5*sin(x/2)*sin(k*x + x/2) + cos(k*x + x)
Combining rational expressions [src]
                      /x\    /x*(1 + 2*k)\
2*cos(x*(1 + k)) + sin|-|*sin|-----------|
                      \2/    \     2     /
------------------------------------------
                    2                     
$$\frac{\sin{\left(\frac{x}{2} \right)} \sin{\left(\frac{x \left(2 k + 1\right)}{2} \right)} + 2 \cos{\left(x \left(k + 1\right) \right)}}{2}$$
(2*cos(x*(1 + k)) + sin(x/2)*sin(x*(1 + 2*k)/2))/2
Combinatorics [src]
   /x\    /x      \               
sin|-|*sin|- + k*x|               
   \2/    \2      /               
------------------- + cos(x + k*x)
         2                        
$$\frac{\sin{\left(\frac{x}{2} \right)} \sin{\left(k x + \frac{x}{2} \right)}}{2} + \cos{\left(k x + x \right)}$$
sin(x/2)*sin(x/2 + k*x)/2 + cos(x + k*x)
Expand expression [src]
                     2/x\                                 /x\    /x\         
                  sin |-|*cos(k*x)                     cos|-|*sin|-|*sin(k*x)
                      \2/                                 \2/    \2/         
cos(x)*cos(k*x) + ---------------- - sin(x)*sin(k*x) + ----------------------
                         2                                       2           
$$\frac{\sin^{2}{\left(\frac{x}{2} \right)} \cos{\left(k x \right)}}{2} + \frac{\sin{\left(\frac{x}{2} \right)} \sin{\left(k x \right)} \cos{\left(\frac{x}{2} \right)}}{2} - \sin{\left(x \right)} \sin{\left(k x \right)} + \cos{\left(x \right)} \cos{\left(k x \right)}$$
cos(x)*cos(k*x) + sin(x/2)^2*cos(k*x)/2 - sin(x)*sin(k*x) + cos(x/2)*sin(x/2)*sin(k*x)/2
Powers [src]
                               /     /  x      \      /x      \\ /   -I*x     I*x\
                               |   I*|- - - k*x|    I*|- + k*x|| |   -----    ---|
 I*(x + k*x)    I*(-x - k*x)   |     \  2      /      \2      /| |     2       2 |
e              e               \- e              + e           /*\- e      + e   /
------------ + ------------- - ---------------------------------------------------
     2               2                                  8                         
$$- \frac{\left(e^{\frac{i x}{2}} - e^{- \frac{i x}{2}}\right) \left(- e^{i \left(- k x - \frac{x}{2}\right)} + e^{i \left(k x + \frac{x}{2}\right)}\right)}{8} + \frac{e^{i \left(- k x - x\right)}}{2} + \frac{e^{i \left(k x + x\right)}}{2}$$
   /x\    /x      \               
sin|-|*sin|- + k*x|               
   \2/    \2      /               
------------------- + cos(x + k*x)
         2                        
$$\frac{\sin{\left(\frac{x}{2} \right)} \sin{\left(k x + \frac{x}{2} \right)}}{2} + \cos{\left(k x + x \right)}$$
sin(x/2)*sin(x/2 + k*x)/2 + cos(x + k*x)
Common denominator [src]
   /x\    /x      \               
sin|-|*sin|- + k*x|               
   \2/    \2      /               
------------------- + cos(x + k*x)
         2                        
$$\frac{\sin{\left(\frac{x}{2} \right)} \sin{\left(k x + \frac{x}{2} \right)}}{2} + \cos{\left(k x + x \right)}$$
sin(x/2)*sin(x/2 + k*x)/2 + cos(x + k*x)