if cos(90°-A)=0,then sin (a+b)is =
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Answered by
1
cos(90-A)=0
cos(90-A)=cos90.
90-A=90
A=180
given
sin(a+b)
sin(180+b)=-sinb
Answered by
0
Answer:
sinB
Step-by-step explanation:
cos(90-A)=sinA which is 0
so sinA=0
sinA=sin0
A=0
sin(A+B)=sin(0+B)
=sinB
plz give the value of sin B
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