Sum the products

Algebra Level 5

Let P ( n ) = k = 0 n ( sin ( k ) + cos ( k ) ) \displaystyle P(n)=\prod_{k=0}^{n} (\sin(k^\circ)+\cos(k^\circ)) and F ( x ) = j = 0 180 P ( j ) x j \displaystyle F(x)=\sum_{j=0}^{180} P(j) \cdot x^{j} . Find the degree of the polynomial F ( x ) F(x) .


The answer is 134.

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1 solution

Archit Agrawal
Sep 24, 2016

After n=134 all terms will be 0 as cos(135°)+sin(135°)=0.

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