The shortest side of an isosceles triangle is 3x - 4 inches long. The two longer sides are each 7 inches longer than the shortest side. The perimeter is 47 inches. What is the length of each of the longer sides of the
triangle?

1. 3. can also be expressed as (22/7)

2. -4.5

3. 3.6

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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