已知f(x)=sin(2x-5π/6),若f(a/2)=4/5,O
人气:399 ℃ 时间:2020-05-13 18:41:07
解答
由题意可得:sin(a-5π/6)=4/5
因为 O
推荐
- 已知函数f(x)=[1+根号2cos(2x-π/4)]/sin(x+π/2),①求f(x)的定义域,②若∠a在第一象限且cosa=3/5,求f(a)
- 已知a∈(π/2,π),且sina/2+cosa/2=√6/2 (1)求cosa的值(2)若sin(a-β)=-3/5,β∈(π/2
- 已知f(x)=sin(2x+π/6)+sin(2x-π/6)+2cos^2x+a,当x属于[-π/4,π/4]时,f(x)的最小值为-3,求实数a的值
- 已知函数f(x)=sin(2x-π/6)+cosx^2,若f(a)=1,求sina*cosa的值
- 已知sin(π/6+a)=4/5,a∈(π/3,5π/6),求cosa的值.
- The gap's being closed easily enables people to enjoy...
- 英语:so far this year we () a fall in house prices by between 3 and 5 percent
- I hate those people who like to take sth out of nothing.
猜你喜欢