A group of 300 Mathematics teachers were classified as follows: University Graduates 120
Diplomats 90
Specialists 50
Others y
a) Calculate the value of y.
b) Draw a pie chart to illustrate the above information.
c) What fraction of the teachers are Specialists.​

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

b.   e = 7.5h

hope this , lovely!

i believe it is 2

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