(1)sinα=0.1111,∠a≈6.379°;
(2)tanθ=7.17,∠θ≈82.06°;
(3)cosβ=0.2987,∠β≈72.62°;
(4)tanθ=0.9876,∠θ≈44.64°.
故答案为6.379°;82.06°;72.62°;44.64°.
(1)sinα=0.1111,∠a≈6.379°;
(2)tanθ=7.17,∠θ≈82.06°;
(3)cosβ=0.2987,∠β≈72.62°;
(4)tanθ=0.9876,∠θ≈44.64°.
故答案为6.379°;82.06°;72.62°;44.64°.