Ответ:
sin a = +
cos a = -
tg a = -
ctg a = -
четверть = II
sin a = -
cos a = +
четверть = IV
tg a = +
ctg a = +
четверть = I
четверть = III
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Ответ:
sin a = +
cos a = -
tg a = -
ctg a = -
четверть = II
sin a = -
cos a = +
tg a = -
ctg a = -
четверть = IV
sin a = +
cos a = +
tg a = +
ctg a = +
четверть = I
sin a = -
cos a = -
tg a = +
ctg a = +
четверть = III
sin a = -
cos a = +
tg a = -
ctg a = -
четверть = IV
sin a = -
cos a = -
tg a = +
ctg a = +
четверть = III
sin a = +
cos a = -
tg a = -
ctg a = -
четверть = II