展开 sec(b)(cos(c)b+1)

解答

展开

sec (b) (cos (c) b + 1)

b cos (c) sec (b) + sec (b)

求解步骤

sec (b) (cos (c) b + 1)

使用分配律:

a (b + c) = ab + a c

sec (b) (cos (c) b + 1) = sec (b) cos (c) b + sec (b) \cdot 1

= sec (b) cos (c) b + sec (b) \cdot 1

化简

sec (b) cos (c) b + sec (b) \cdot 1 : b cos (c) sec (b) + sec (b)

= b cos (c) sec (b) + sec (b)

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

e x p an d (12 = 0.074 x + 2.59 + 7.4 x) \cdot 7.4

e x p an d \frac{- 12 x ^{2} - x + 33}{( x - 1 ) ( x + 3 ) ( 3 - 2 x )}

e x p an d \frac{( 8 t - 2 ) ^{2}}{9}

s im pl i f y (1 - \frac{t}{10}) (1 - \frac{t}{7})