cos(A)=0.4639

解

cos (A) = 0.4639

A = 1.08840 \dots + 2 πn, A = 2 π - 1.08840 \dots + 2 πn

度

A = 62.36094 \dots^{\circ} + 36 0^{\circ} n, A = 297.63905 \dots^{\circ} + 36 0^{\circ} n

解答ステップ

cos (A) = 0.4639

三角関数の逆数プロパティを適用する

cos (A) = 0.4639

以下の一般解

cos (A) = 0.4639

cos (x) = a \Rightarrow x = arccos (a) + 2 πn, x = 2 π - arccos (a) + 2 πn

A = arccos (0.4639) + 2 πn, A = 2 π - arccos (0.4639) + 2 πn

A = arccos (0.4639) + 2 πn, A = 2 π - arccos (0.4639) + 2 πn

10進法形式で解を証明する

A = 1.08840 \dots + 2 πn, A = 2 π - 1.08840 \dots + 2 πn