求厚膠片的折射率
<P><img src="data/attachment/forum/dvbbs/2005-3/200535113758855.gif" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'data/attachment/forum/dvbbs/2005-3/200535113758855.gif\');}" onmousewheel="return imgzoom(this);" alt="" /></P><P>請問如何證明tan b= /cos a</P>
<P>求各位大俠幫幫忙?
</P> 把公式中的三角关系 和m n用 线段来表示 带入即可
页:
[1]