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36 cos^2 [10] - 96 cos^2 [10] + 64 cos^2 [10] how to simplify this one ?

 Apr 20, 2016
 #1
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36 cos^2 [10] - 96 cos^2 [10] + 64 cos^2 [10]

 

Notice that we can factor out cos^2 (10)  from every term and we're left with :

 

cos^2 (10)  * [ 36 - 96 + 64]  =

 

cos^2 (10)  * [ 4]  =

 

4* [cos (10)]^2  =

 

about   3.879

 

 

 

cool cool cool

 Apr 20, 2016
 #2
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Sry ! it seems i mistyped the power of the cos a little bit, can you please help me again ?
 

36 cos^2 [10] - 96 cos^4 [10] + 64 cos^6 [10]

 

Thx !

 Apr 20, 2016
 #3
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Figured it out just now it was supposed to be factor in the form of 

 

[6cos 10 - 8 cos^3 10]^2

 

Thx for your response !  

 Apr 21, 2016

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