Question

I have some parts of a triangle but I don't know how to use them, can I have help piecing it together?

Answer 1

Parts as in the lengths? or some lengths and some angles? or what?

Answer 2

I need to find sin theta, when cot theta is -2 and cos theta is < 0

Answer 3

using triangle only ??
you can use identities , if u know them

Answer 4

hlaf angleS?

Answer 5

no, half angle identities won't be required
first u find cos theta, using pythgorean identity, then cot theta = cos theta/sin theta

Answer 6

oh, sorry

Answer 7

ok I'll try it

Answer 8

first u find cosec theta, using pythgorean identity, then sin theta =1/ cosec theta

Answer 9

Proceed with the triangle. since each trig function is a ratio of sides on a triangle you can draw what you know, complete the final side and find your last ratio. The only part that requires thought is what quadrant it will be in (based on the signs)

Answer 10

so 2(cot^2 theta)=1/cos^2 theta?

Answer 11

\[\cot\theta=\frac{adj}{opp}\]
{fill in first triangle, solve the hypotenuse}
\[\sin\theta=\frac{opp}{hyp}=\frac{1}{\sqrt5}\]