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Mathematics
Mathematics
Problem
For an angle
ϕ
\phi
ϕ
in Quadrant III,
tan
ϕ
=
3
4
\tan\phi=\dfrac{3}{4}
tan
ϕ
=
4
3
. Find
sin
ϕ
+
cos
ϕ
\sin\phi+\cos\phi
sin
ϕ
+
cos
ϕ
. a)
7
5
\dfrac{7}{5}
5
7
b)
−
1
5
-\dfrac{1}{5}
−
5
1
c)
−
7
5
-\dfrac{7}{5}
−
5
7
d)
5
7
\dfrac{5}{7}
7
5
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