What is a half-angle identity to find the exact value of sin? Group of answer choices

sin⁡θ=(2-cos⁡2θ)/3

sin⁡θ=(1-cos⁡2θ)/2

sin⁡θ=(1+cos⁡2θ)/2

sin⁡θ=(1-cos⁡2θ)/4

the bottom of the spinner is not flat.

step-by-step explanation:

give more details

step-by-step explanation:

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