Question

If5sinx+12cosx=13 then tanx=?

Answer 1

Answer:

5/13sinx+12/13cosx=1

cosa.sinx+sina.cosx=1 or

sina.sinx+cosa.cosx=1

sin(a+x)=pie/2 or cos(a-x)=0

a+x=pie/2 or a-x=0

a=x=pie/4

tanx=1