sin-5π/3
周期是2π
=sin(π/3-2π)
=sinπ/3
=√3/2
cos-11π/4
周期是2π
=cos(-3π/4-2π)
=cos(-3π/4)
=cos(3π/4)
=-√2/2
三角函数化解的问题sin-5π/3=√3/2cos-11π/4=-√2/2我算出来的答案第一个是=-√3/2第二个是=-
3个回答
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