1. The angle θ lies in Quadrant I. sinθ=25

What is cosθ?

−21√5

−25

21√5

25

2. cos(−θ)=−2√5, sinθ>0

What is the value of sinθ?

2√5

−2√5

−23√5

23√5

2/5

b. 1.25 hr

step-by-step explanation:

if you have a constant speed of 60 mph, then you have a ratio between 60 mi. to 1 hr. dividing both sides by 60 we get the ratio

1 mi. to

then mult. both sides by 75 we get the ratio

75 mi. to

simplifying we get

75 mi. to

or 1.25 hr.

if you was gonna solve for a, a is a   < -12