觀察角α從0增大到2π時(shí)正弦線長(zhǎng)度的變化,填寫空格:①當(dāng)α從0增大到π/2是,sinα從逐漸增大到_?

觀察角α從0增大到2π時(shí)正弦線長(zhǎng)度的變化,填寫空格:①當(dāng)α從0增大到π/2是,sinα從__逐漸增大到___?
②當(dāng)α 從π/2增大到π時(shí),sinα從__逐漸__（增大或減?。┑絖_?
③當(dāng)α從π增大到3π/2時(shí),sinα從__逐漸__到___?
④當(dāng)α從3π/2增大到2π是,sinα從__逐漸__到___?

數(shù)學(xué)人氣：396 ℃時(shí)間：2020-06-15 20:15:50

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