cos(-
π)-sin(-
π)的值为 ⊙ ___ .
人气:130 ℃ 时间:2020-01-29 05:10:38
解答
cos(-
)-sin(-
)=cos
π+sin
=cos(4π+
)+sin(4π+
)=cos
+sin
=
+
=
.
故答案为:
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