ashleyew28 ashleyew28

25-07-2016
Mathematics

contestada

Which equation is not an identity?

tan(–t) = –tan t

tan t(csc t + cot t) = sec t + 1

sin tcot t = cos t

cos2t − sin2t = –1

Respuesta :

briannapruna4 briannapruna4

25-07-2016

Not 100% positive but i believe it is the third choice

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Аноним Аноним

25-07-2016

Hey there,

Let t = 0 and you'd get 1 - 0 = -1 which is false

I would go for (D)

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