Originally Posted by
davellew69 not surehow for 1.27 a the answer is a sqrt 2 and for b the answer is a/sqrt 2 can any one kindly go through the steps as this as been bugging me for days. many thanks
If:
Code:
/|
/ |
a / |
/ | L
/ |
/ |
/ |
--------
L
Then
So .
That's what the solution says.