已知tana=1,3sinB=sin(2a+B),求tan(a+b/2)
来源:学生作业帮助网 编辑:作业帮 时间:2024/11/05 16:31:29
已知tana=1,3sinB=sin(2a+B),求tan(a+b/2)
已知tana=1,3sinB=sin(2a+B),求tan(a+b/2)
已知tana=1,3sinB=sin(2a+B),求tan(a+b/2)
tana=1 a=kπ+π/4
3sinB=sin(2a+B)=sin(2kπ+π/2+B)=cosB
3sinB=cosB
sin^2B+cos^2B=1
cos^2B=9/10 sin^2B=1/10
sinB=√10/10 cosB=3√10/10
tan(a+b/2)=(1+tamB/2)/(1-tanB/2)=(cosB/2+sinB/2)/(cosB/2-sinB/2)
=(1+sinB)/cosB
=(√10+1)/3
sinB=-√10/10 cosB=-3√10/10
tan(a+b/2)=(1+tamB/2)/(1-tanB/2)=(cosB/2+sinB/2)/(cosB/2-sinB/2)
=(1+sinB)/cosB
=(-√10+1)/3
已知tana=1,3sinB=sin(2a+B),求tan(a+b/2)
已知3sinb=sin(2a+b)且tana=1,求tan(a+b).
已知tanA=1,sin(2A+B)=3sinB,求tan(A+B)?
已知tana=1,3sinB=sin(2a+B),求tanB
已知3sinB=sin(2A+B),求证tan(A+B)=2tanA
已知5sinb=sin(2a+b) 求证 tan(a+b)/tana=3/2
已知tan(A+B)=2tanA,求证3sinB=sin(2A+B)
已知sin(2a+B)=2sinB,求证tan(a+B)=3tana
已知:3sinb=sin(2a+b),求证:tan(a+b)=2tana
已知sin(2a+b)=5sinb,求证:2tan(a+b)=3tana
已知3tana=2tan(a+b),求证:sin(2a+b)=5sinb
已知3sinb=sin(2a+b),则tan(a+b)/tana=
已知sin(2a+b)=3sinb且tana=0.5,求tanb
已知SIN(2A+B)=3SINB,求TAN(A+B)/TANA
已知sin(2a-b)=3sinb,则tan(a-b)/tana
已知tana=1,3sinB=sin(2a+B),求tan(a+B)的值.(要具体过程)
-2tana+3sinb+5=0 tana-6sinb-1=0 求tana
已知a是锐角,且2tana+3sinb=7;tana-6sinb=1,求sina=?