展开 csc(a)(tan(a)-sin(a))

解答

展开

csc (a) (tan (a) - sin (a))

csc (a) tan (a) - 1

求解步骤

csc (a) (tan (a) - sin (a))

使用分配律:

a (b - c) = ab - a c

csc (a) (tan (a) - sin (a)) = csc (a) tan (a) - csc (a) sin (a)

= csc (a) tan (a) - csc (a) sin (a)

csc (a) sin (a) = 1

= csc (a) tan (a) - 1

e x p an d \frac{( 2 x + 12 ) ^{2}}{4} + \frac{( y - 4 ) ^{2}}{4}

e x p an d (- 5 - 33)^{3}

e x p an d \frac{25 ( s + 0.03 ) ( s + 1 )}{( s + 0.4 ) ( s ^{2} - 0.36 s + 0.16 )}

e x p an d \frac{( x + 8 ) ( x - 6 )}{2}

e x p an d \frac{x ^{2} - 3 x - 4}{( x - 1 ) ( x + 2 ) ^{2}}