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Marnett305 Marnett305
  • 12-07-2015
  • Mathematics
Answered

Find all solutions to the equation. 7 sin2x - 14 sin x + 2 = -5

Verified Answer :

Julik
Julik Julik
  • 13-07-2015

7sin²x-14sinx+2= -5
7sin²x-14sinx+7=0
7(sin²x-2sinx+1)=0
sin²x-2sinx+1=0
(sinx-1)(sinx-1)=0
sinx-1=0
sinx=1
\(x= \frac{ \pi }{2} +2n \pi\)  where n is an integer


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