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____ [38]
3 years ago
9

1A. Write the fully expanded expression for 7!

Mathematics
2 answers:
cestrela7 [59]3 years ago
6 0

Answer:

1*2*3*4*5*6*7

Step-by-step explanation:

zhenek [66]3 years ago
3 0
See pic below for the answer

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IrinaVladis [17]
The answer would be 
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igor_vitrenko [27]

Answer:

y= -3 + 2x/3

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move all terms that dont contain y to the right side and solve

Hope this helps! have a nice day! Please consider making me Brainliest!

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<em>I'm not 100% sure but I think 3 days.</em>

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7 0
3 years ago
Verify the identity. <br><br> tan x plus pi divided by two = -cot x
kogti [31]
Recall that sin(π/2) = 1, and cos(π/2) = 0,

\bf \textit{Sum and Difference Identities}&#10;\\\\&#10;sin(\alpha + \beta)=sin(\alpha)cos(\beta) + cos(\alpha)sin(\beta)&#10;\\\\&#10;sin(\alpha - \beta)=sin(\alpha)cos(\beta)- cos(\alpha)sin(\beta)&#10;\\\\&#10;cos(\alpha + \beta)= cos(\alpha)cos(\beta)- sin(\alpha)sin(\beta)&#10;\\\\&#10;cos(\alpha - \beta)= cos(\alpha)cos(\beta) + sin(\alpha)sin(\beta)\\\\&#10;-------------------------------\\\\&#10;

\bf tan\left(x+\frac{\pi }{2}  \right)=-cot(x)\\\\&#10;-------------------------------\\\\&#10;tan\left(x+\frac{\pi }{2}  \right)\implies \cfrac{sin\left(x+\frac{\pi }{2}  \right)}{cos\left(x+\frac{\pi }{2}  \right)}&#10;\\\\\\&#10;\cfrac{sin(x)cos\left(\frac{\pi }{2}  \right)+cos(x)sin\left(\frac{\pi }{2}  \right)}{cos(x)cos\left(\frac{\pi }{2}  \right)-sin(x)sin\left(\frac{\pi }{2}  \right)}\implies \cfrac{sin(x)\cdot 0~~+~~cos(x)\cdot 1}{cos(x)\cdot 0~~-~~sin(x)\cdot 1}&#10;\\\\\\&#10;\cfrac{cos(x)}{-sin(x)}\implies -cot(x)
7 0
3 years ago
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