định lý cosin, sin

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A-Level Further and Additional Maths

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29 Terms

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<p>h²</p>

h²

b’c’

<p>b’c’</p>
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<p>SinB</p>

SinB

CosC=c/a

<p>CosC=c/a</p>
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<p>CosB</p>

CosB

SinC=b/a

<p>SinC=b/a</p>
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<p>a²</p>

a²

b²+c²-2bccosA

<p>b²+c²-2bccosA</p>
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<p>Diện tích tam giác bất kì</p>

Diện tích tam giác bất kì

½ đáy.cao= ½ ah(a)= ½ bh(b)= ½ ch©

<p>½ đáy.cao= ½ ah(a)= ½ bh(b)= ½ ch<span data-name="copyright" data-type="emoji">©</span></p>
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<p>Diện tích tam giác</p>

Diện tích tam giác

½ abSinC= ½ bcSinA= ½ acSinB

<p>½ abSinC= ½ bcSinA= ½ acSinB</p>
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<p>Diện tích hbh</p>

Diện tích hbh

Đáy.cao

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<p>Diện tích hình thoi</p>

Diện tích hình thoi

m.n/2

<p>m.n/2</p>
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<p>Thể tích hình, a=b</p>

Thể tích hình, a=b

V=a³√2/12

<p>V=a³√2/12</p>
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