Question

Choose one of the following and share a full solution. Use the checklist to guide your work on this.

Answer 1

Given -

(a) sin (π + x)

To Find -

Simplify =?

Step-by-Step Explanation -

(a) sin (π + x)

We know the formula for:

sin (A + B) = sinAcosB + cosAsinB

So, Applying it we get :

= sinπcosx + cosπsinx

Now, we know

sinπ = 0 and cosπ = -1

Applying the values, we get:

= 0 -sinx

= -sinx

Final Answer -

sin (π + x) = - sinx

Graph for sin (π + x) :