Which statement best describes the association between variable X and variable Y?

perfect negative association

strong negative association

moderate positive association

no association

hope it you

step-by-step explanation:

sin(7pi/6 - pi/3)  

= sin(7pi/6 - 2pi/6)  

= sin(5pi/6)  

= sin(pi - pi/6)  

= sin(pi/6)  

= 1/2  

sin 7pi/6 - sin pi/3  

= sin (pi + pi/6) - sin pi/3  

= -sin pi/6 - sin pi/3  

= -1/2 - sqrt(3)/2  

= -(1+sqrt(3))2

it is contrapositive

i could not see the question too well so check yourself again too . this is because i want you to get it correct.

m∠a is 90°

m∠b is 40°