Question

Find length A(a cos theta , 0) , B(0, a sin theta)​

Answer 1

Answer:

a units

Step-by-step explanation:

distance between two points is given by

$\sqrt{ ({x - x1})^{2} + (y - y1) ^{2} }$

$= \sqrt{(a \cos( \alpha )- 0)^{2}+(0-a \sin( \alpha ))^{2}}$

$= \sqrt{ {a}^{2}( { \cos( \alpha ) ^{2} + \sin( \alpha ) }^{2} ) }$

$= \sqrt{ {a}^{2} } = a$