Asked by Angela
simplify the expression 2sin^2 t + cos^2 t-2
Answers
Answered by
Reiny
2sin^2 t + cos^2 t-2
=2sin^2t + 1 - sin^2t - 2
=sin^2t - 1
which could be factored to
(sinx+1)(sinx-1)
=2sin^2t + 1 - sin^2t - 2
=sin^2t - 1
which could be factored to
(sinx+1)(sinx-1)
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