Перевести в радианы угол \(\alpha=87^\circ\) .
\(\frac{7\pi}{15}\)
\(\frac{29\pi}{60}\)
\(\frac{2\pi}{3}\)
\(\frac{5\pi}{12}\)
\(\frac{2\pi}{5}\)
\(\frac{13\pi}{30}\)