Question

решете только 3и 4 пожалуста

Answer 1

2. c = 75 - гипотенуза, угол beta = 53° 8', alpha = 90° - 53° 8' = 36° 52'

b = c*sin beta = 75*sin 53° 8'

a = c*sin alpha = 75*sin 36° 52'

3. a = 15; b = 8; c = √(15^2 + 8^2) = √(225+64) = √289 = 17

Углы sin alpha = a/c = 15/17; sin beta = b/c = 8/17.

4. b = 90; угол beta = 58° 7'; alpha = 90° - 58° 7' = 31° 53'

Гипотенуза c = b/sin beta = 90/sin 58° 7'

Катет a = c*sin alpha = 90*sin 31° 53'/sin 58° 7'