factor and simplify (trig)?

0 ⤊

sinxcos^2x-sinx

(cos^2x-9)/(cosx-3)

cos^2x + cos^2x tan^2x

2007-05-13 16:14:31 · 2 answers · asked by qwerty123 1 in Science & Mathematics ➔ Mathematics

sinx(cos^2x -1)
sinx ( cosx-1)(cosx+1)

(cosx -3)(cosx +3)/ cosx -3)
cancel the cosx-3 terms and get
cosx + 3

cos^2x(1 + tan^2x)

2007-05-13 16:22:29 · answer #1 · answered by lizzie 3 · 0⤊ 0⤋

sin x.(1 - 2sinÂ² x) - sin x
= - 2sinÂ³ x

(cos x - 3).(cos x + 3) / (cos x - 3)
cos x + 3

cosÂ²x + cosÂ²x.(sinÂ²x / cosÂ²x)
cosÂ²x + sinÂ²x
= 1

2007-05-14 04:26:54 · answer #2 · answered by Como 7 · 0⤊ 0⤋