- #1
tahayassen
- 270
- 1
If we see the form [itex]\sqrt { { a }^{ 2 }-{ x }^{ 2 } }[/itex], we always set [itex]x=asinθ[/itex]
How do we know that it will work in advance? Just trial & error?
How do we know that it will work in advance? Just trial & error?