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Mathematics
Mathematics
Problem
Given
13
sin
A
=
12
13 \sin A = 12
13
sin
A
=
12
, find : a.
sec
A
−
tan
A
\sec A - \tan A
sec
A
−
tan
A
b.
1
cos
2
A
−
tan
2
A
\frac{1}{\cos^2 A} - \tan^2 A
c
o
s
2
A
1
−
tan
2
A
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