展开 cot(x)(sin(x)-sec(x))

解答

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cot (x) (sin (x) - sec (x))

cot (x) sin (x) - cot (x) sec (x)

求解步骤

cot (x) (sin (x) - sec (x))

使用分配律:

a (b - c) = ab - a c

cot (x) (sin (x) - sec (x)) = cot (x) sin (x) - cot (x) sec (x)

= cot (x) sin (x) - cot (x) sec (x)

e x p an d A (3, - 5)

e x p an d A (5, 4) y B (- 3, - 2)

e x p an d π (4 - 37) + (112 - 7)

e x p an d \frac{2 x}{( x - 2 ) ( x + 2 )}

e x p an d (x + y) ((x + y) + 1) - (x x + 1)