? (2) Answer: 0.505438+02
? (3) Answer: 0.9999
? (4) Answer: 3.438+0
I forgot how to do it ... sorry.
Three. Tan 55 = B/24 B ≈ 34.2756
? sin 35 = 24/°c? c≈4 1.8427
Four. AD=3,∠ b = 60? According to trigonometric function BD=√3? AB=2√3
The triangle BDA∽BAC is BD/AB = AB/BC.
√3/2√3=2√3/BC? Get BC=4√3.
There is something wrong with this question. The waist of an isosceles triangle is larger than the bottom, and your 5∶8 is not in accordance with the law.
Intransitive verb 20 nautical miles
7. I don't understand
I hope my answer is helpful to you!
Typing is very hard, hope to adopt! ! ! ! !