A-A+
Given that sin A=5/13 and 0°≤A< 360° what are
问题详情
Given that sin A=5/13 and 0°≤A< 360°, what are all possible values of cos A ？
A.-5/13 only
B.-5/13 and 5/13
C.12/13 only
D.-12/13 only
E.-12/13 and 12/13请帮忙给出正确答案和分析，谢谢！
参考答案
正确答案：E
考点：
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