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Problem
Problem
The value of
4
cos
π
10
−
3
sec
π
10
−
tan
π
10
4 \cos \frac{\pi}{10} - 3 \sec \frac{\pi}{10} - \tan \frac{\pi}{10}
4
cos
10
π
−
3
sec
10
π
−
tan
10
π
is equal to a. 1 b.
5
−
1
\sqrt{5} - 1
5
−
1
c.
5
+
1
\sqrt{5} + 1
5
+
1
d. zero
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