[题目]求曲线 =cos x 在 (dfrac (pi )(3),dfrac (1)(2)) 处的切线方-|||-程.

[题目]求曲线 =cos x 在 (dfrac (pi )(3),dfrac (1)(2)) 处的切线方-|||-程.

[题目]求曲线 =cos x 上点 (dfrac (pi )(3),dfrac (1)(2)) 处的切线方程-|||-和法线方程.

13.求曲线 =cos x 上点 (dfrac (pi )(3),dfrac (1)(2)) 处的切线方程和法线方程.

13.求曲线 =cos x 上点 (dfrac (pi )(3),dfrac (1)(2)) 处的切线方程和法线方程.

[题目]求曲线 =sin x 在 =dfrac (pi )(4) 处的切线方程.

12.设曲线的极坐标方程为 rho =dfrac (1)(pi )(1-cos theta ), 求曲线在 theta =dfrac (pi )(2) 处的切线

[题目]求椭圆 dfrac ({x)^2}(4)+dfrac ({y)^2}(9)=1 在点 (1,dfrac (3sqrt {3)}(2)) 处的法线方-||

(int )_(-dfrac {pi )(2)}^dfrac (pi {2)}dfrac (|x|sin x)(1+{cos )^3x}dx=(int )_(-

(sin x)=dfrac (1)({cos )^2x} in (0,dfrac (pi )(2)),则(sin x)=dfrac (1)({cos )^2x}

[题目]求 lim _(xarrow infty )((sin dfrac {2)(x)+cos dfrac (1)(x))}^x