sin a = +
cos a = -
tg a = -
ctg a = -
четверть = II
a = 310°sin a = -
cos a = +
tg a = -
ctg a = -
четверть = IV
a = 440° ←→(аналогично) а=440°-360°=80°sin a = +
cos a = +
tg a = +
ctg a = +
четверть = I
a = 250°sin a = -
cos a = -
tg a = +
ctg a = +
четверть = III
a = -31°sin a = -
cos a = +
tg a = -
ctg a = -
четверть = IV
a = -145°sin a = -
cos a = -
tg a = +
ctg a = +
четверть = III
a = 125°sin a = +
cos a = -
tg a = -
ctg a = -
четверть = II
