kobeni-chan
  • kobeni-chan
Simplify: (trig)
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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kobeni-chan
  • kobeni-chan
|dw:1432849570143:dw|
Nnesha
  • Nnesha
foil (1-sintheta)(1+sintheta) = ?
Nnesha
  • Nnesha
\[\huge\rm (1- \sin \theta)(1+\sin \theta)=?\] do you know how to foil ?

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kobeni-chan
  • kobeni-chan
1+sintheta-sintheta+sintheta?
kobeni-chan
  • kobeni-chan
Oh wait the last one is sin^2theta, right?
Nnesha
  • Nnesha
yep right
Nnesha
  • Nnesha
now combine like terms
kobeni-chan
  • kobeni-chan
1+sintheta
Nnesha
  • Nnesha
nope
Nnesha
  • Nnesha
\[\huge\rm -\sin \theta \times \sin \theta =?\]
kobeni-chan
  • kobeni-chan
Oh, so 1-sin^2theta ?
Nnesha
  • Nnesha
yes right which is equal to what function *trig identity* 1-sin^2theta = what ?
kobeni-chan
  • kobeni-chan
cos^2theta?
Nnesha
  • Nnesha
yep right so \[\sqrt{\cos^2 \theta } = ?\]
kobeni-chan
  • kobeni-chan
+- cos theta
Nnesha
  • Nnesha
yes right it's cos theta :-)
kobeni-chan
  • kobeni-chan
Yay :) thank you
Nnesha
  • Nnesha
my pleasure :-) good job!

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