Yefim S. answered • 06/17/21
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Cos (90 +x) x tan(540 +x) x cos(180 - x) + sin(-90) = - sinxtanx(- cosx) - 1 = sin2x - 1 = - cos2x
Mukovhanama J.
asked • 06/17/21Simplify with a calculator
Cos (90 +x) x tan(540 +x) x cos(180 - x) + sin(-90)
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