Question

Can someone tell me what I'm doing wrong? Cotθ=-2/5. π/2< θ<π. Find the other five trigonometric functions of θ.

Answer 1

Tanθ=-5/2, so isn't cosθ=-2 and sinθ=5?

Answer 2

find \(h\) via pythagoras
then you can take any trig ratio you like

Answer 3

also it is impossible for sine to be 5
sine is never bigger than one
it is ratios you need

Answer 4

so its 2nd quadrant

Answer 5

Right.. But the tangent identity is sinθ/cosθ

Answer 6

just because \[\cot(x)=\frac{\cos(x)}{\sin(x)}\] doesnt mean cosine is the numerator and sine is the denominator

Answer 7

oh .. -.-

Answer 8

ty

Answer 9

yw

Answer 10

@campbell_st picture is better than mine, it shows you what quadrant you are in
i usually just ignore that, and would figure out the signs of the trig functions by being told you are in quadrant 2

Answer 11

yeah i got that part, thank you :D