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nallaico585
20.04.2020 •
Mathematics
What is equivalent to 45.701
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Ответ:
45 _701/1000
Step-by-step explanation:
Ответ:
Angle Y equals 58.9 degrees (to the nearest tenth)
Step-by-step explanation: The triangle given in the question already has all three sides provided, while none of the angles has been given. We can apply the cosine rule which states that,
c^2 = a^2 + b^2 - 2ab CosC
Where C is the reference angle, we shall replace this with a new label, Y to suit our question. Hence our Cosine Rule can be re-written as ;
y^2 = x^2 + z^2 -2xz CosY
20^2 = 22^2 + 18^2 -(2{22 x 18}CosY)
400 = 484 + 324 - (2{396} CosY)
400 = 808 - (792 CosY)
Subtract 808 from both sides of the equation
-408 = -792CosY
Divide both sides of the equation by -792
-408/-792 = CosY
0.5151 = CosY
By use of calculator or table of values, 0.5151 equals 58.9958
Approximately to the nearest tenth,
Y = 58.9 degrees