One side of a rectangle is 7 meters and it's perimeter is 50 meters. How long are three other sides?

One side of the rectangle is 7m

Second side of the rectangle is 18m

And the other is 18m

Step-by-step explanation:

Two sides of the rectangle is 7, since both the sides of a rectangle are same.

50 - (7 + 7)

50 - 14 = 36

To find the other two sides, you have to divide 36 by 2

the sides of the rectangle are 7, 7, 18, 18.

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step-by-step explanation:

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