Use a calculator to calculate [[$ \tan {\alpha} $]] at the accuracy of three decimal places, when

a) [[$ \alpha = $]] [[$ 1° $]]

Answer: [[$ \tan {\alpha} ≈ $]]

b) [[$ \alpha = $]] [[$ 50° $]]

Answer: [[$ \tan {\alpha} ≈ $]]

c) [[$ \alpha = $]] [[$ 89° $]].

Answer: [[$ \tan {\alpha} ≈ $]]