liczba-sin320circcos220circcdotsin20circ-jest-rowna

$\cos20^\circ$\cos20^\circ

$\sin20^\circ$\sin20^\circ

$\tg20^\circ$\tg20^\circ

$\sin20^\circ\cdot \cos20^\circ$\sin20^\circ\cdot \cos20^\circ