锟斤拷锟斤拷secx锟斤拷锟斤拷锟筋，锟斤拷锟斤拷锟角猴拷锟斤拷(sh锟斤拷)锟斤拷一锟絅锟斤拷锟斤拷锟侥讹拷锟絰锟斤拷锟斤拷锟斤拷锟斤拷(g锟斤拷)锟斤拷(sh锟斤拷)锟斤拷(sh锟斤拷)锟斤拷锟斤拷值锟斤拷锟角絕锟斤拷值锟斤拷锟节碉拷锟斤拷一锟侥岋拷(sh锟斤拷)锟斤拷(sh锟斤拷)锟斤拷锟斤拷锟斤拷锟斤拷锟节猴拷锟斤拷(sh锟斤拷)锟斤拷锟斤拷锟斤拷小锟斤拷锟斤拷锟节烇拷2π锟斤拷

锟斤拷锟斤拷1sec锟斤拷什么锟斤拷思

锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟角猴拷锟斤拷(sh锟斤拷)锟斤拷锟斤拷锟斤拷锟斤拷(sh锟斤拷)锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟叫★拷锟斤拷锟斤拷锟斤拷锟斤拷矢锟斤拷之一锟斤拷锟斤拷锟斤拷锟斤拷2kπ锟斤拷2kπ+π/2锟侥區(q锟斤拷)锟絞之锟絞锟斤拷锟斤拷锟斤拷(sh锟斤拷)锟斤拷锟絝锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟筋函锟斤拷(sh锟斤拷)锟斤拷锟斤拷锟揭猴拷锟斤拷(sh锟斤拷)锟斤拷锟介倒锟斤拷(sh锟斤拷)锟斤拷

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锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟角猴拷锟斤拷(sh锟斤拷)一锟斤拷锟斤拷锟斤拷锟筋函锟斤拷(sh锟斤拷)一锟接匡拷锟皆擴(ku锟斤拷)展锟斤拷锟斤拷(f锟斤拷)锟斤拷(sh锟斤拷)锟斤拷

锟斤拷锟斤拷2sec锟斤拷cos锟斤拷锟絇(gu锟斤拷n)系

锟斤拷锟斤拷sec锟斤拷锟斤拷(sh锟斤拷)锟斤拷cos锟斤拷锟斤拷(sh锟斤拷)锟斤拷锟介倒锟斤拷(sh锟斤拷)锟絇(gu锟斤拷n)系锟斤拷锟斤拷sec=1/cos锟斤拷cos=1/sec锟斤拷

锟斤拷锟斤拷锟阶猴拷锟斤拷锟絰锟斤拷cos锟斤拷示锟斤拷邊锟斤拷斜邊锟斤拷sec锟斤拷示斜邊锟斤拷锟斤拷邊锟斤拷

锟斤拷锟斤拷锟斤拷锟斤拷指锟斤拷锟斤拷直锟斤拷锟斤拷锟斤拷锟轿ｏ拷斜邊锟絚某锟斤拷(g锟斤拷)锟絁锟角碉拷锟斤拷邊锟侥憋拷锟斤拷锟斤拷锟斤拷該锟絁锟角碉拷锟斤拷锟斤拷锟斤拷锟斤拷 sec锟斤拷锟角ｏ拷锟斤拷示锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟揭猴拷锟斤拷(sh锟斤拷)锟侥碉拷锟斤拷(sh锟斤拷)锟斤拷

锟斤拷锟斤拷锟斤拷锟揭ｏ拷锟斤拷锟揭猴拷锟斤拷(sh锟斤拷)锟斤拷锟斤拷锟斤拷锟角猴拷锟斤拷(sh锟斤拷)锟斤拷一锟絅锟斤拷锟斤拷Rt锟斤拷ABC锟斤拷直锟斤拷锟斤拷锟斤拷锟轿ｏ拷锟叫ｏ拷∠C=90°锟斤拷锟斤拷D锟斤拷示锟斤拷锟斤拷∠A锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷邊锟斤拷锟斤拷锟斤拷锟轿碉拷斜邊锟斤拷锟斤拷cosA=b/c锟斤拷也锟缴岋拷锟斤拷cosa=AC/AB锟斤拷

锟斤拷锟斤拷锟斤拷锟絇(gu锟斤拷n)锟斤拷锟絔锟斤拷

锟斤拷锟斤拷锟竭匡拷锟斤拷(sh锟斤拷)锟絎(xu锟斤拷)知锟絉(sh锟斤拷)锟絚(di锟斤拷n)锟絉锟斤拷

锟斤拷锟斤拷arcsinx锟侥圖锟斤拷锟斤拷什么锟斤拷

锟斤拷锟铰高匡拷锟結訊锟斤拷锟竭匡拷锟斤拷锟斤拷锟斤拷锟斤拷前锟斤拷(zh锟斤拷n)锟斤拷锟斤拷志愿锟斤拷锟�(b锟斤拷o)锟斤拷锟饺★拷锟�?j锟斤拷n)?sh锟斤拷)锟斤拷锟斤拷

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锟組锟斤拷"锟竭匡拷锟絎(w锟斤拷ng)"微锟脚癸拷锟斤拷號(h锟斤拷o)