1) sin α =0.8 ⇒ cos α = √(1-sin²α) = √(1-0.64) =√0.36 = 0.6
2) tg α = sin α/cosα = 0.8/0.6 = 8/6 = 4/3
3) tg α =CC1/AC ⇒ CC1 = H = tg α·AC
4) AC² = AB²+BC²-cosα·AB·BC = 12²+12²-cos120·12·12 = 12²(2+0.5) ⇒ AC =12√2.5
5) CC1 = H = tg α·AC = tgα· 12√2.5
ответ: H = tgα· 12√2.5
1) sin α =0.8 ⇒ cos α = √(1-sin²α) = √(1-0.64) =√0.36 = 0.62) tg α = sin α/cosα = 0.8/0.6 = 8/6 = 4/33) tg α =CC1/AC ⇒ CC1 = H = tg α·AC4) AC² = AB²+BC²-cosα·AB·BC = 12²+12²-cos120·12·12 = 12²(2+0.5) ⇒ AC =12√2.55) CC1 = H = tg α·AC = tgα· 12√2.5ответ: H = tgα· 12√2.5
1) sin α =0.8 ⇒ cos α = √(1-sin²α) = √(1-0.64) =√0.36 = 0.6
2) tg α = sin α/cosα = 0.8/0.6 = 8/6 = 4/3
3) tg α =CC1/AC ⇒ CC1 = H = tg α·AC
4) AC² = AB²+BC²-cosα·AB·BC = 12²+12²-cos120·12·12 = 12²(2+0.5) ⇒ AC =12√2.5
5) CC1 = H = tg α·AC = tgα· 12√2.5
ответ: H = tgα· 12√2.5
1) sin α =0.8 ⇒ cos α = √(1-sin²α) = √(1-0.64) =√0.36 = 0.6
2) tg α = sin α/cosα = 0.8/0.6 = 8/6 = 4/3
3) tg α =CC1/AC ⇒ CC1 = H = tg α·AC
4) AC² = AB²+BC²-cosα·AB·BC = 12²+12²-cos120·12·12 = 12²(2+0.5) ⇒ AC =12√2.5
5) CC1 = H = tg α·AC = tgα· 12√2.5
ответ: H = tgα· 12√2.5