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Find the exact length of side a.

Find The Exact Length Of Side A class=

Sagot :

abidemiokin

The exact length of a which is equivalent to BC is 7units

Cosine rule

A triangle is a shape with 3 sides and angles. In order to determine the sides BC, we will use the cosine rule

c² = a² + b² - 2abcosC

Given the following parameters

b = 2

c = 5√3

theta = 30 degrees

Substitute

c² = 2² + (5√3)² - 2abcos30
c² = 4 + 75 - 2(2)(5√3)*√3/2

c² = 79 - 30
c² = 49
c = 7 units

Hence the exact length of a which is equivalent to BC is 7units

Learn more on triangles here: https://brainly.com/question/17335144

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