Question

Can anyone tell me why I was wrong? Trig functions

Answer 1

http://mathmistakes.info/facts/TrigFacts/learn/vals/sum.html

Answer 2

\[
\sin \left(\frac{4 \pi }{3}\right)=-\frac{\sqrt{3}}{2}\]

Answer 3

\[

\cos \left(\frac{4 \pi }{3}\right)=-\frac{1}{2}
\]

Answer 4

The remaining ones are easy

Answer 5

Thank you both!

Answer 6

:)

Answer 7

\[
\tan \left(\frac{4 \pi }{3}\right)=\sqrt{3}
\]