Factor the trigonometric expression. 10 cos2 x + 21 cos x − 10

Factor the trigonometric expression. 10 cos2 x + 21 cos x − 10 There is more than one correct form of the answer.

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1 Answer

me suspekt that straenj stuf shood be

10*kosine^2(x) +21 kosine(x)-10

let kosine(x) be x & yu hav 10x^2+21x-10=0

yuze quadratik equashun...

anser:  (x-0.4)*(x+2.5)

put kosine bak in
by

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