Sin2x = 2sinxcosx;
cos2x = (cosx)^2 - (sinx)^2;
tan2x = (sin2x)/(cos2x);
cosx = 5/13 from formula (sinx)^2 + (cosx)^2 = 1;
=> sin2x = 120/169;
.................................
The law of cosines is
c= square root of a^2 + b^2 - 2ab cos c
the law of sines is
a = b(sin a /sin b)
-18/35
is the answer hope I am helpful
Well, 1/4 = 2x.
1/4 / x = 2
cause 2x is multiplication
and the other side shows divison for the right side of the and
also, solution
x = .125
