What is expand cos((5pi)/8) ?

The solution to expand cos((5pi)/8) is -(sqrt(2-\sqrt{2)})/2

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expand cos((5pi)/8)

expand

cos (\frac{5 π}{8})

- \frac{2 - 2}{2}

Decimal Notation

- 0.38268 \dots

Solution steps

cos (\frac{5 π}{8})

Rewrite using trig identities:

- cos (\frac{3 π}{8})

= - cos (\frac{3 π}{8})

Rewrite using trig identities:

cos (\frac{3 π}{8}) = \frac{2 - 2}{2}

= - \frac{2 - 2}{2}

P^{1} (\frac{5}{4}, - \frac{7}{2})

e^{j (4 t + 5 3^{\circ})} + e^{- j (4 t - 5 3^{\circ})}

\frac{2 y}{( 3 y - 2 x ) ^{2}}

\frac{\partial}{\partial x} ((f (x, y)) (x - y))

U (2, - 3, 4) V (1, 2, 1)

What is expand cos((5pi)/8) ?
The solution to expand cos((5pi)/8) is -(sqrt(2-\sqrt{2)})/2