21-09-2019
Mathematics

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Sin 2x-4 Sinx- Cosx + 2 = 0

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salma1148 salma1148

21-09-2019

Answer:

(2sinx-1) (cosx-2)

Step-by-step explanation:

sin 2x=2sinxcosx

2sinxcosx-4sinx-cosx+2=

2sinxcosx-cosx+2-4sinx=

cosx (2sinx-1) +2-4sinx=

cosx(2sinx-1) +2(1-2sinx) =

cosx (2sinx-1) -2(2sinx-1) =

(2sinx-1) (cosx-2)

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