937 103 Marks Here is a semicircle of radius x.
Хcm
a) Choose the correct expression for the perimeter of the shape.
πX2 210x TEX + 2x
πX
2
A
B
С
D
b) The perimeter of the shape is 25.71 cm
+
Calculate the value of the radius x.
Take it to be 3.142
JUN
w
30
A
What is the answer for B

y=1/4x-4

step-by-step explanation:

need more detail

step-by-step explanation:

lele

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