Sin 160 + cos 160 * tg 370

Question

Sin 160 + cos 160 * tg 370

Answer 1

Sin(180-20) +cos(180-20)×tg(360+10)= sin20-cos20×tg10=sin20-cos20×sin10/cos10=(sin20×cos10-cos20×sin10)/cos10=sin(20-10)/cos10=
=sin10/cos10=tg10