What equation do you get when you solve, rs + h² = l for h

sin2@ cos 2 @ i salways equl to one  

(p/h)2 +(b/h)2

p2/h2 +b2/h2

as p2 +b2is equal to h2  

then h2/h2 =1

sorry if it incorrect

hope it : d

x is variable or an unknown value to find

example:

2x = 5 which means x = 3