Is r=b2 + 1 proportional?

Yes,it was proportional...

Step-by-step explanation:

To tell if 2 variables are directly proportional while looking at their graphs,note if their x-and y- intercept coordinates are changed by the same factor.If they are,they are proportional.

If you don't have a graph,you can tell if

2 variables are directly proportional by writing down the equation of the line.

answer: cos [   arcsin (3/5) - arccos (1/2) ] =

step-by-step explanation: × = 3/5 = 0.6--> x = 36.87 and x = 180 - 36.87 = 143.13 deg

cos y = 1/2 --> y = +- 60 deg a. cos (x - y) = cos (143.13 - 60) = cos 83,13  

=

0.12

b. cos (36.87 - 60) = cos (-23.23) = 0.92

you first to choose the points and then move from then as the slope you have