Question

Evaluate the function w/o using a calculator!
sec 135
Ahh please help me! I need someone to explain how to do this or show work! Thank you!

Answer 1

calculate
\[\cos(135)\] and then take the reciprocal

Answer 2

your angle is 135 the coordinates of that point on the unit circle are
\[(-\frac{\sqrt{2}}{2},\frac{\sqrt{2}}{2})\] cosine is the first coordinate

Answer 3

therefore
\[\cos(135)=-\frac{\sqrt{2}}{2}\] and so
\[\sec(135)=-\frac{2}{\sqrt{2}}=-\sqrt{2}\]

Answer 4

Thanks, can you also help me with tan(240)?
I'm starting to understand. First i need to find a coterminal and then sketch the reference angle?

Answer 5

yes i guess. you can also find 240 on the unit circle

\[60+60+60+60=240\]

Answer 6

leftt \(-\frac{1}{2}\), down \(-\frac{\sqrt{3}}{2}\)

Answer 7

How do you find the square roots?