问题描述:
高一数学三角函数特殊角的值,
tan cos sin0°15°30°45°60°90°120°135°150°180°210°225°250°270°300°360°
tan cos sin0°15°30°45°60°90°120°135°150°180°210°225°250°270°300°360°
问题解答:
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