Correct Answer - Option 2 : y = x tan α
Concept :
Streamline equation
\( \frac{{{\rm{dx}}}}{{\rm{u}}} = \frac{{{\rm{dy}}}}{{\rm{v}}}\)
Calculation:
Given:
u = acos α, v = asin α
\( \frac{{{\rm{dx}}}}{{{\rm{a}}\cos {\rm{α }}}} = \frac{{{\rm{dy}}}}{{{\rm{a \sinα }}}}\)
dy = tanα dx
By integrating both sides
y = xtan α