Question

Points A, B, and C are plotted on the unit circle...Which of the coordinates is equal to sin(310°)?

Answer 1

Given:

$\sin (310\text{\degree)}$

You need to remember that in Trigonometry:

Therefore, knowing that the angle given is:

$310\text{\degree}$

You can identify that it is between 270 degrees and 360 degrees:

$270\text{\degree}<310\text{\degree}<360\text{\degree}$

Hence, it must be in Quadrant IV.

Look at the picture below:

Therefore, in this case, you can determine that:

$(x,y)=(\cos (310\degree),\sin (310\text{\degree))}$

Hence, the answer is: Option f.