What is the length of the indicated arc?
a pi
b (1/2) pi
c 3 pi
d 4 pi
e none of the above

E. None of the above

Step-by-step explanation:

Arc length = radius • angle in radians

30 deg =  0.523599 rad

L = 12 • 0.523599 = 6.28319

2π = 6.28319

Answer is E. None of the above

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

the area of the rectangle is 35units^2.

step-by-step explanation:

graph it and find the distance.

it is a 5*7 rectangle.

therefore the area is 35units^2.