Find the radius and diameter of a Frisbee with a circumference of 11π inches.

radius = 5.5 inch

diameter = 11 inch

Step-by-step explanation:

Circumference = 2πr     Formula to find the radius

11π = 2π (r)       Plug numbers into the equation

5.5 = r         Divide both sides by 2 to isolate the variable (r)  

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

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