试题 试卷
题型:计算题 题类:常考题 难易度:普通
(1)sinα=0.5018.(2)cosA=0.6531.(3)tanβ=0.3750.
(1)cosα= , tanβ=;
(2)sinα=0.456 7,cosβ=0.567 8.
(1)已知sinα=0.4771,求∠α;
(2)已知cosα=0.8451,求∠α;
(3)已知tanα=1.4106,求∠α.
(1)sinθ=0.1426;
(2)cosθ=0.7845.
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