Question

If 5cos A=7sin A find sin A and cos A

Answer 1

Its easy.
Sin A/Cos A=5/7
Tan A=5/7=perpendicular/base
Let perpendicular(p)=5x
Base(b)=7x

Hypotenuse(h)=√(p^2+b^2)
h=√60x
Sin A=p/h=5x/√60x=5/√60
similarly for Cos A.