若sinx=sin(3π2-x)=2,则tanx+tan(3π2-x)的值是( )
A: -2
B: -1
C: 1
D: 2
A: -2
B: -1
C: 1
D: 2
举一反三
- 若sinx=sin(3π2-x)=2,则tanx+tan(3π2-x)的值是( )
- $\int {{{x\cos x} \over {{{\sin }^3}x}}} dx = \left( {} \right)$ A: $ - {x \over {2{{\sin }^2}x}} - {1 \over 2}\tan x + C$ B: $ - {x \over {2{{\sin }^2}x}} - {1 \over 2}\cot x + C$ C: $ - {x \over {2{{\cos }^2}x}} - {1 \over 2}\cot x + C$ D: $ - {x \over {2{{\cos }^2}x}} - {1 \over 2}\tan x + C$
- (1)解不等式(3|x|-1)≤(|x|+3).(2)解不等式|x+3|-|2-x|>4.
- 若sinx+sin(,则tanx+tan(﹣x)的值是 A: ﹣2 B: ﹣1 C: 1 D: 2
- 已知1<x<2,则|2-x|+|1-x|=______.