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10-04-2017
Mathematics

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PLEASE HELP!!! WILL GIVE BRAINLEST AWARD FOR MOST DESCRIPTIVE
Solve for x using cosine law

x^2 = 5^2 + 10^2 - (2510*cos60)

Respuesta :

10-04-2017

The law of cosines states that:

c^2=a^2+b^2-2abcosC

You already have all the values for the variables with the exception of x so:

x^2=25+100-100cos60

x=√(125-100cos60)

x=√75

x≈8.66 to nearest one-hundredth...

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