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Mathematics
Mathematics
Problem
If
sin
x
=
7
25
\sin x=\dfrac{7}{25}
sin
x
=
25
7
and
x
x
x
is an obtuse angle, determine
cos
x
\cos x
cos
x
. a)
24
25
\dfrac{24}{25}
25
24
b)
−
24
25
-\dfrac{24}{25}
−
25
24
c)
−
7
24
-\dfrac{7}{24}
−
24
7
d)
−
3
2
5
-\dfrac{3\sqrt{2}}{5}
−
5
3
2
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