用R程序编程求下列的值,正确的命令是 ( )[img=192x60]180398c78107728.jpg[/img]
A: tan(1/2*asin(-1/4))
B: tan[1/2*asin(-1/4)]
C: tan(1/2)*asin(-1/4)
D: tan[1/2]*asin(-1/4)
A: tan(1/2*asin(-1/4))
B: tan[1/2*asin(-1/4)]
C: tan(1/2)*asin(-1/4)
D: tan[1/2]*asin(-1/4)
举一反三
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- \(\int { { {\sec }^{3}}xdx}\)=( ) A: \(\frac{1}{2}\sec x\cot x-\frac{1}{2}\ln \left| \sec x+\tan x \right|+C\) B: \(\frac{1}{2}\sec x\tan x+\frac{1}{2}\ln \left| \sec x+\tan x \right|+C\) C: \(-\frac{1}{2}\csc x\tan x+\frac{1}{2}\ln \left| \sec x-\cot x \right|+C\) D: \(-\frac{1}{2}\sec x\tan x-\frac{1}{2}\ln \left| \csc x+\tan x \right|+C\)