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2 answers:
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Answer:
cos 225° =
sin 225° =
tan 225° = 1
Step-by-step explanation:
I cannot sketch a diagram, but a 225° angle is a 3rd quadrant angle and the reference angle is 45° (225 - 180 = 45)
cos and sin are negative in the 3rd quadrant and the tan is positive
cos 225° = - cos 45° =
sin 225° = -sin 45° =
tan 225° = tan 45° = 1
Before the first straw is drawn, there are three short straws and 
straws in all. Thus, the probability of drawing a short straw first is 
.
After a short straw is drawn, there are two short straws and twelve total straws, a probability of
.
Thus, the probability of both of these events occurring is
.
After a short straw is drawn, there are two short straws and twelve total straws, a probability of
Thus, the probability of both of these events occurring is