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һ¡‮ ʮ‬ һ( )
𣿡ʵʵʲôħģһϵûУǼȻС࣬Ѿ⾝ˡ

ϣԽԽásinĻش˵

أ突Ȼ֪ôģΪ突Ȼʶ漴ֶҰٰĺãھȻĪijҵ⽗ףһ˵ij֣DZʲôԭֻҪ֪ģһб㶼һ˼ġˡ˼һ۱能看ġ

ңdzΪְ֮ǰ֮ҶֻҪֺ‮ȫ‬Ļشҵ⣬突ȻתЦ˵‮ȫ‬һ㣬ֻҪ㲻ˣӦȫԱ֤ġ

ˣȥһ£ҿɲ봩⾝Уȥ˵վ⾝¥ȥˣлڲͣػζղǶ̶̵ļ仰

һҾѾ⾐⾊ij񣬃һ⾝⾊Сȹȹ˫ϥ‮˿‬䣬Ļһ˫⾊ԲͷСѥױÿʱ⾐νϼӺڣҴ⾝߷ԾҲ˷κβԡ

ã㴩ҹ⾐⼲𣿡突ȻſڽȤ

ˣsinǻشʵ

ˣDzţȻѾôһƬشվ⾝ߵСۺϳ²ͣĵͷ͵

ʲô˶Уʲô¶ܷsin̾˵վ⾝ߵ⾝ԡ

үҪȥС۲ʲôʵ

ǰҺ;Ҫȥһܲsinǵ

ܲҲȥǸĴָҲŵʡ

ȻǸصش绰뾲ġsin˵

ҲòŴƵġɰġЦ˵

ү˵䡣Сۼҵ⾊ԽԽѿæֹ

ˣ˵ھߡsin˵

үǴôȥϳ突Ȼʵ

ôȥsin˵ղ流˲ٵ⾎ǿȥɣ

үԿסϳ´⾐ڴͳݸsinһԵĸsin⾝ȥȥˡһѾ뿪˱ֵǣһֱֵĴϴţѵ˵ܲҲǴ

Сʲôڳʵ

ʵСʱһֱɱԱsinƽĻش

ΪʲôҪôһ汻弄Ϳˣ˵ɱˣΪ˳䏊ɱΪʲôأ

Ϊħϵָʾش

ԭ⼊ħħһ⽔⽔𣿡Ѿ⾎֪ʵ

Ǿ˵ħλϺ񲢲ĺƽsinЩε˵

ǾСһܰô˵

㻹֪ж󰡣̶̵ļʮѾɱʮԱлһϰϡ׸񡣡˵׸ֵʱsinг䜺ϧ֮飬ϰϲһһٶ꣬ٻеġ

϶ɱ˲ˣ˵һߵĿȴͬ͸Ϣɱ

ʵҴӸղžһֱ㣬ΪʲôôSĴӦȥܲsin突Ȼת仰ʵҲܲҸղŻɱɣ

ΪղᵽСࡣһش˵

ô򵥣㲻̫⾜

أҷʵ

ѵԕM⾎е֮֯һûһ𣿡sin˵ţתЦЦ

ҿһ‮Ȥ‬ûУҵǶǵǸЩ档ǰУҲ˵ֻεЦЦش

ŶΪʲôΪ܏󣿡sin²ʵ

Ҳô˵һشM⾎ď͹ϾͳȣԽϵĕM⾎ԽDzʵ

Ҫʧˡsinϧ

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