Question
a.
\(N_φ=cot^2 (45°+\frac{φ}{2})\)
b.
\(N_φ=cos^2 (45°+\frac{φ}{2})\)
c.
\(N_φ=tan^2 (45°+\frac{φ}{2})\)
d.
\(N_φ=sin^2 (45°+\frac{φ}{2})\)
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