7^2=14^2+12^2-2(14)(12)(cos x*) X=?

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What? I dont get it

7^2=14^2+12^2-2(14)(12)(cos x*)  Solve for x

Try using this. https://www.symbolab.com This website hels me alot

Looks like the Law of Cosines:

7^2 = 49

14^2 = 196

12^2 = 144

2x14x12 = 336

49  =  196 + 144 - 336cos(X)

49  =  340 - 336cos(X)              (Don't subtract the 336 from the 340!)

-291  =  -336cos(X)

0.8661  =  cos(X)

X = cos^-1(0.8661)  --->   X  =  30°