展开-ln|1+cos^2(7.5)|

解答

展开

- ln 1 + cos^{2} (7.5)

- 0.11346 \dots

求解步骤

- ln 1 + cos^{2} (7.5)

化简

1 + cos^{2} (7.5) : 1 + cos^{2} (7.5)

= - ln (cos^{2} (7.5) + 1)

cos^{2} (7.5) = 0.12015 \dots

= - ln (1 + 0.12015 \dots)

数字相加:

1 + 0.12015 \dots = 1.12015 \dots

= - ln (1.12015 \dots)

整理为小数形式

= - 0.11346 \dots

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

e x p an d (λ - e^{- w} μ) (e^{w} - 1)

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

e x p an d \frac{120 x ^{2}}{( 3 x + 5 ) ^{4}}

e x p an d p or (- 5, - 2)