hannal11103
Answered

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I'm not sure at all how to do this
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Im Not Sure At All How To Do This class=

Sagot :

Answer:

Step-by-step explanation:

Cos(Ф) = Adj / Hyp

Cos(Ф) = Adj / 5

use Pythagoras's  

[tex]5^{2}[/tex] =  [tex]2^{2}[/tex] +[tex]x^{2}[/tex]

25 - 4 = [tex]x^{2}[/tex]

21 = [tex]x^{2}[/tex]

[tex]\sqrt{21}[/tex] = x

Cos(Ф) = [tex]\sqrt{21}[/tex] / 5      

(using the square root means the answer is exact. so leave it like that.)

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