展开 (tan(x)+sqrt(3))(2sin(x)-1)

解答

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(tan (x) + 3) (2 sin (x) - 1)

2 sin (x) tan (x) - tan (x) + 23 sin (x) - 3

求解步骤

(tan (x) + 3) (2 sin (x) - 1)

Apply FOIL method

(tan (x) + 3) (2 sin (x) - 1) : 2 sin (x) tan (x) - tan (x) + 23 sin (x) - 3

= 2 sin (x) tan (x) - tan (x) + 23 sin (x) - 3

s im pl i f y (k + k^{2} - 4 p)^{2}

s im pl i f y (x - i \cdot y)^{2}

e x p an d \frac{x ( 1 - 9 x ) ( 3 x + 2 )}{2 ( 3 x + 1 ) ( 3 x - 1 ) ( x + 7 )}

e x p an d 6 (\frac{6}{12} + \frac{8}{12} + \frac{9}{12})

e x p an d cos (2) (t - \frac{π}{2})