chrissy45
chrissy45
30-04-2017
Mathematics
contestada
Help on these precalc problems 14-20
Respuesta :
egenriether
egenriether
30-04-2017
15) factor out cos: cos(x)(sin(x)+1)=0
Now this is true when either cos(x)=0 (x=pi/2 and 3pi/2)
Or when sin(x)=-1 (x=3pi/2)
So it's solutions are pi/2 and 3pi/2
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