Use the special right triangle to evaluate sin 60°, cos 60° and tan 60°. your answers should be exact (not a decimal).
a. sin 60 = 1/2, cos 60 = √3/2, tan 60 = √3/3
b. sin 60 = √2/2, cos 60 = √2/2, tan 60 = 1
c. sin 60 = 1, cos 60 = 0, tan 60 = undefined
d. sin 60 = √3/2, cos 60 = 1/2, tan 60 = √3

x + y = 90 5x – 10y = 90 90 – 10y = 5x 90 + 10y = 5x

step-by-step explanation:

last month maria hiked the 5-mile mountain trail a number of times and she hiked the 10-mile canal trail several times. let x represent the number of times she hiked the 5-mile trail, and let y represent the number of times she hiked the 10-mile trail. if she hiked a total of 90 miles, which equation can be used to find the number of times maria hiked each trail? x + y = 90 5x – 10y = 90 90 – 10y = 5x 90 + 10y = 5x