What is the trig function equation for this problem?

Use the cosine function where x° = 63.43°

Step-by-step explanation:

In relation to angle x°, side 3 is adjacent, and side 3√5 is the hypotenuse. Therefore, the trig function that uses the adjacent and hypotenuse is the cosine function. You would then set your equation up and solve for x°:

cos(x°) = adjacent/hypotenuse

cos(x°) = 3/(3√5)

x° = cos⁻¹(3/(3√5))

x° = 63.43°

a is the right answer

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.