Answer:
r=3
Step-by-step explanation:
Simplify the expression
16-2r=3r+1
isolate r by adding 2r to both sides
16=5r+1
isolate the numbers by subtracting 1 from both sides
15=5r
divide both sides by 5 to completely isolate r
16 - 2r = -3r + 6r +1
Combine like terms
16-2r = 3r +1
Add 2r to each side
16-2r+2r = 3r+2r +1
16 =5r+1
Subtract 1 from each side
16-1 = 5r+1-1
15 = 5r
Divide by 5 on each side
15/5 = 5r/5
3 =r
cos A = 16/20 = 4/5
tan A = 12/16 = 3/4
sin A = 12/20 = 3/5
c
