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Which 1 is true? If cos x = a than cos -x = a << i know this one is true if sin x = a then sin pi-x = a ? if tan x = a than tan -x = a ?

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  • Which 1 is true? If cos x = a than cos -x = a << i know this one is true if sin x = a then sin pi-x = a ? if tan x = a than tan -x = a ?


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