9. Вычислите tg(π/6) · ctg(π/3) + cos π.

Question

tg(π/6) = 1/√3, ctg(π/3) = 1/√3, cos π = −1.

(1/√3) · (1/√3) − 1 = 1/3 − 1 = −2/3.

Ответ: −2/3.

Accepted Answer

tg(π/6) = 1/√3, ctg(π/3) = 1/√3, cos π = −1.

(1/√3) · (1/√3) − 1 = 1/3 − 1 = −2/3.

Ответ: −2/3.