just plug $\dfrac \pi 6$ in and evaluate it. There's nothing tricky here at all.
If you are asking how to plug this into your calculator you're in the wrong place.
please...help me with this...
Im having a hard time calculating this on my calculator... for the fact that I didnt knew what button (sine squared) should i press
by the way...the answer that you've seen in the photo was just the answer in an application when Im trying to calculate it over there....But the real answer in the answers key is 3
...I REALLY NEED YOUR HELP GUYS