Question

Help please and thank you!

Answer 1

Option A

Step-by-step explanation:

`\rightarrow \sf sin\left((7\pi )/(6)\right)`

`\rightarrow \sf \sin \left(\pi +(\pi )/(6)\right)`

`\rightarrow \sin \left(\pi \right)\cos \left((\pi )/(6)\right)+\cos \left(\pi \right)\sin \left((\pi )/(6)\right)`

`\rightarrow \sf 0 * (√(3))/(2)+\left(-1\right) * (1)/(2)`

`\rightarrow \sf -(1)/(2)`