sin(2*3π/8+φ)=o怎么解

sin(2*3π/8+φ)=o怎么解 怎么解4sinθ-3cosθ+2=0求sinθ的值 泰勒公式的为什么㏑( 1 + sin X ) = sin X - ( sin X )²/2 +(sin X )³ /3 -(sin X )∧4 + o (sin ∧4 X ),完全不理解, 计算,sin(π/12)-sin(5π/12)+2sin(π/8)sin(3π/8) 化简sin(α+β)+sin(α-β)+2sinαsin(3π/2-β)= y=sin(x+π/3)+2定义域怎么求? sin x 3 cos x =2怎么解? 三角函数sin（2kπ+α）=sinα怎么用?sin（3π/2+α）=sin（2π-（π/2-α）=sin(-(π/2-α)= 已知α∈(o,π/2).3sinα=2cosα/2,那么cos2α=? 怎么用matlab的fsolve解方程?function q=myfun(p)x=p(1);y=p(2);z=p(3);q(1)=100*cos(x)+150*cos(y)*cos(z)-200;q(2)=100*sin(x)-150*sin(y)*cos(z)-1600*sin(1*pi/180);q(3)=sin(z)-1600*(1-cos(1*pi/180))/L2;x=fsolve('myfun',[0,0,0]',optimset('Display','o y=2sin(2x+pai/6)x属于[-pai,O]的单调减区间是答案是[-7pai/12,-pai/3]怎么算出来的啊 已知sina-2cosa=o,求tan(-a-派)sin(-派-a)/sin(派-a)cos(2派-a)sin(-a+2/3派）求值 已知sinα是方程5x平方-7x-6=o的根,求〔sin(-α-3π/2)sin(3π/2-α)tg平方α)].已知sinα是方程5x平方-7x-6=o的根,求〔sin(-α-3π/2)sin(3π/2-α)tg平方α)]／[cos(π/2-α)cos(π/2+α)ctg(π-α)] o``````计算sin[(2k+1)π/4] + cos[(2k+1)π/4]之值.`` ``怎么计算的呢? 已知函数f(x)=√3sin(ωx+φ)-cos(ωx+φ)(o 已知函数f(x)=sin(wx+φ),(w>o,-pai/2 sin a+sin 2a +sin 3a +...+sin na怎么求和? sin a+sin 2a +sin 3a +...+sin na怎么求和?