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monadias
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  • 27-07-2016
  • Mathematics
Answered

Cos^2 75degrees-sin^2 75 degrees

Verified Answer :

Panoyin
Panoyin Panoyin
  • 27-07-2016

\(cos(150\°)\)
\(cos(2(75\°))\)
\(cos^{2}(75\°) - sin^{2}(75\°)\)
\(1 - 2sin^{2}(75\°)\)
\(2cos^{2}(75\°) - 1\)

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