Question

Trig? :)

Answer 1

What are the sine, cosine, and tangent of Θ = 7 pi over 4 radians?

Answer 2

I don't necessarily need the answer, but more how to solve questions like so.

Answer 3

\[\theta= \frac{ 7 \pi }{ 4 }= \left( 2 \pi-\frac{ \pi }{ 4 } \right)\]
\[hence ~\theta~lies~\in~4th~quadrant.\]
in 4th quadrant cos and sec are positive .
All other t-ratios are negative.

Answer 4

\[\sin \frac{ 7 \pi }{ 4 }=\sin \left( 2\pi-\frac{ \pi }{ 4 } \right)=-\sin \frac{ \pi }{ 4 }=?\]

Answer 5

similarly cos and tan

Answer 6

I'm sorry, I don't understand any of it.

Answer 7

@surjithayer