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Mathematics
Mathematics
Problem
In
△
A
B
C
\triangle ABC
△
A
B
C
with
∠
C
=
90
∘
\angle C = 90^{\circ}
∠
C
=
9
0
∘
, you know
A
C
=
15
cm
AC = 15\,\text{cm}
A
C
=
15
cm
and
∠
A
=
52
∘
\angle A = 52^{\circ}
∠
A
=
5
2
∘
. Which of the following expressions correctly gives the length of
B
C
BC
B
C
? a)
15
cot
52
∘
15 \cot 52^{\circ}
15
cot
5
2
∘
b)
15
sin
52
∘
15 \sin 52^{\circ}
15
sin
5
2
∘
c)
15
tan
52
∘
15 \tan 52^{\circ}
15
tan
5
2
∘
d)
15
tan
52
∘
\dfrac{15}{\tan 52^{\circ}}
tan
5
2
∘
15
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