sin.cos.tan30 45 60 分别是多少啊?
\u4e09\u89d2\u51fd\u6570sin\uff0ccos,tan30\u00b0\u65f645\u00b0\u65f660\u00b0\u65f6\u7684\u6570\u503csin30\u00b0=1/2
cos30\u00b0=2\u5206\u4e4b\u6839\u53f73
tan30\u00b0=3\u5206\u4e4b\u6839\u53f73
sin45\u00b0=2\u5206\u4e4b\u6839\u53f72
tan45\u00b0=1
cot45\u00b0=1
sin60\u00b0=2\u5206\u4e4b\u6839\u53f73
cos60\u00b0=1/2
tan60\u00b0=\u6839\u53f73
sinA\u7b49\u4e8e\u3014\u6839\u53f72\u3015/2=> a= 45\u5ea6
sin30\u00b0\uff1d1/2\uff0csin45\u00b0\uff1d\u6839\u53f72/2\uff0csin60\u00b0\uff1d\u6839\u53f73/2
cos30\u00b0\uff1d\u6839\u53f73/2\uff0ccos45\u00b0\uff1d\u6839\u53f72/2\uff0ccos60\u00b0\uff1d1/2
tan30\u00b0\uff1d\u6839\u53f73/3\uff0ctan45\u00b0\uff1d1\uff0ctan60\u00b0\uff1d\u6839\u53f73
cos30=√3/2
tan30=√3/3
sin45=√2/2
cos45=sin45=√2/2
tan45=1
sin60=√3/2
cos60=1/2
tan60=√3
扩展阅读:cos30 45 60 ... sin30 ... tan30 45 60 ... sin cos tan象限正负图 ... sin cos tan30 60 90 ... tan60 ... sincostan度数表0到360 ... sin度数表大全0到180 ... cossintan角度表 ...