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Trig Identity concentration

Plays concentration using Trigonometric Identities

AB
sin 2A2sinAcosA
$ cos^2 x + sin^2 x $1
sin(A+B)sinAcosB + cosAsinB
cos (A-B)cosAcosB + sinAsinB
cos 2A2cos^2A-1
tan (A+B)(tanA+tanB)/(1-tanAtanB)
$ \sqrt [2]{4}$2
$\cos^2 x + \sin^2 x$1

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