Seudónimo Seudónimo

11-07-2020
Mathematics

contestada

Express as a product: 1+2cosα

Respuesta :

surjithayer10 surjithayer10

11-07-2020

Answer:

Step-by-step explanation:

1+2 cos α

[tex]=1+2(2 cos^{2} \frac{\alpha }{2} -1)\\=1+4 ~cos^2\frac{\alpha }{2} -2\\=4 ~cos^2\frac{\alpha }{2} -1\\=(2cos \frac{\alpha }{2} +1)(2 cos \frac{\alpha }{2} -1)[/tex]

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