Answer :

Answer:

Step-by-step explanation:

Use the identity [tex]sin(a+b)=sin a cosb+sinbcosa[/tex] where [tex]a=x[/tex] and [tex]b=\pi[/tex].

This results in [tex]sinxcos\pi +sin\pi cosx[/tex]

From the unit circle we know that [tex]cos\pi =-1[/tex] and [tex]sin\pi =0[/tex]

Substitute

[tex]sinx(-1)+(0)cosx[/tex]

Simplify

[tex]-sinx[/tex]

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