Step-by-step explanation:
Height of ladder = 12ft .
Here perpendicular is height to which it reaches .
When angle is 30⁰ :-
=> sin 30⁰ = H/12
=> ½ = H/12
=> H = 12/2
=> H = 6m ( ans )
When Angle is 45⁰ :-
=> sin45⁰ = H/12
=> 1/√2 = H/12
=> H = 6*√2*√2/√2
=> H = 6√2 m ( ans )
When angle is 60⁰ :-
=> sin60⁰ = H/12
=> √3/2 = H/12
=> H = 12 *√3/2
=> H = 6√3 ( ans )
hope it helped !
