将下列三角函数转化为锐角三角函数 特别急!急啊!sin623°42`= sin(-3π/5)= tan3π/5 cos(-11π/9)= cos(-104°26`)= tan17π/6
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将下列三角函数转化为锐角三角函数 特别急!急啊!sin623°42`= sin(-3π/5)= tan3π/5 cos(-11π/9)= cos(-104°26`)= tan17π/6
将下列三角函数转化为锐角三角函数 特别急!急啊!
sin623°42`= sin(-3π/5)= tan3π/5 cos(-11π/9)=
cos(-104°26`)= tan17π/6
将下列三角函数转化为锐角三角函数 特别急!急啊!sin623°42`= sin(-3π/5)= tan3π/5 cos(-11π/9)= cos(-104°26`)= tan17π/6
sin623°42`= -sin83°42`
sin(-3π/5)= -sin72°
tan3π/5=-tan72°
cos(-11π/9)=-cos40°
cos(-104°26`)= -cos14°26`
tan17π/6=-tan30°