turkey-yks 2012 Q24

turkey-yks · Other · lys1-math Sine and Cosine Rules Find an angle using the cosine rule
ABCD is a square, $|BE| = 5$ cm, $|EC| = 7$ cm, $m(\widehat{EAC}) = x$.
According to the given information, what is $\tan x$?
A) $\frac { 4 } { 13 }$
B) $\frac { 6 } { 13 }$
C) $\frac { 9 } { 13 }$
D) $\frac { 5 } { 17 }$
E) $\frac { 7 } { 17 }$
ABCD is a square, $|BE| = 5$ cm, $|EC| = 7$ cm, $m(\widehat{EAC}) = x$.

According to the given information, what is $\tan x$?

A) $\frac { 4 } { 13 }$\\
B) $\frac { 6 } { 13 }$\\
C) $\frac { 9 } { 13 }$\\
D) $\frac { 5 } { 17 }$\\
E) $\frac { 7 } { 17 }$