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любопытная11
@любопытная11
November 2021
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Упростите:
a)1-[tex]sin ^{2} a-cos ^{2} a[/tex]
б)[tex]cos ^{2} a-(1-2sin ^{2} a)[/tex]
в)[tex]sina*ctga[/tex]
г)[tex]tg a * cos a[/tex]
д)[tex] \frac{sina}{tga} [/tex]
е)[tex]tga*ctga-1[/tex]
ж)[tex]sin ^{2} a-1/1-cos ^{2} a[/tex]
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manyny06
Verified answer
1. 1-(sin²α+cos²α) = 1-1=0
2. cos²α-cos²α = 0
3. sinα * cosα\sinα = cosα
4. sinα\cosα * cosα = sinα
5. sinα : sinα\cosα = sinα * cosα\sinα= cosα
6. sinα\cosα * cosα\sinα =1
7. -cos²α \ sin²α = - ctg ²α
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Answers & Comments
Verified answer
1. 1-(sin²α+cos²α) = 1-1=02. cos²α-cos²α = 0
3. sinα * cosα\sinα = cosα
4. sinα\cosα * cosα = sinα
5. sinα : sinα\cosα = sinα * cosα\sinα= cosα
6. sinα\cosα * cosα\sinα =1
7. -cos²α \ sin²α = - ctg ²α