Question

Reducir: E=cos10⁰+cos30⁰+cos50⁰+cos70⁰

Answer 1

\cos \left(10^0\right)=\cos \left(1\right)

\cos \left(10^0\right)=\cos \left(1\right)

\cos \left(30^0\right)=\cos \left(1\right)

\cos \left(50^0\right)=\cos \left(1\right)

\cos \left(70^0\right)=\cos \left(1\right)

=\cos \left(1\right)+\cos \left(1\right)+\cos \left(1\right)+\cos \left(1\right)

4\cos \left(1\right)

Explicación paso a paso: