Answer:
Thus, the blanks should be completed with 1;0 respectively
Step-by-step explanation:
Cosine of the sum of angles
The formula for the cosine of angles \alpha and \beta is shown below:
[tex]cos(\alpha+\beta)=cos\alpha*cos\beta-sin\alpha*sin\beta[/tex]
For the expression given in the question:
[tex]cos(x+2\pi)=cosx*cos2\pi-sinx*sin2\pi[/tex]
Since
[tex]cos 2\pi=1, sin2\pi=0:[/tex]
[tex]cos(x+2\pi)=cosx*1-sinx*0[/tex]
Thus, the blanks should be completed with 1;0 respectively
