Use the law of cosines to find the value of 245 cos theta

Mathematics

2 answers:

Lena [83]3 years ago

6 0

Answer:

The answer is 37

Step-by-step explanation:

sweet-ann [11.9K]3 years ago

3 0

We can proceed in solving the problem since all information are given such as 2*4*5costheta.
we have a=4, b=5, and C=theta
let us solve for "c" using Pythagorean
c²=a²+b²
c²=4²+5²
c=6.4
Solving for theta or C
c²=a²+b²-2abcosC
6.4²=4²+5²-2*4*5*cosC
C=90

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