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Найдите cos a, tg a и ctng a. если sina = 1/6.

Ответ:

Aizhan190901

30.05.2020 07:40

(2х-15)/(3х+8)=-1 умножим это выражение на 3х+8 2x-15=-3х-8 а дальше как обычно 2х+3х=-8+15 5х=7 Х=1,4

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Ответ:

прост1232

30.05.2020 07:40

(2х-15) :(3х+8)=-1
2х - 15= -1 (3х+8)
2х - 15 = -3х - 8
2х + 3х= -8+15
5х=7
х= 1,4

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