Question

REPLY BACK PLEASE.. HAVE NO CLUE AT ALL

Answer 1

Go on a calculator 
cosine=Adjacent/Hypotenuse
Cosine=6/ 3 the square root of 5
reduce to 1/square root of 5 which is your answer...so the answer is B)

Hope this helps!!

Answer 2

Sine = $\dfrac{\text{opposite}}{\text{hypotenuse}}$
sine = $\dfrac{3}{3 \sqrt{5}}$
sine = $\dfrac{1}{ \sqrt{5} }$

Cosecant is reciprocal of sine, that means
cosecant = $\dfrac{1}{\text{sine}}$

input the value of sine
cosecant = $\dfrac{1}{ \dfrac{1}{ \sqrt{5} } }$
cosecant = $1: \dfrac{1}{ \sqrt{5}}$
cosecant = $1 \times \dfrac{ \sqrt{5} } {1}$
cosecant = $\sqrt{5}$

The answer is first option