allied angle of 270+theata is it -cos theata
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which grade question is this please do answer
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Step-by-step explanation:
Given that:-
Allied angle of cos(270°+θ)
It can be written as
=cos(360°−90°+θ)
=cos[360°−(90°−θ)]
we know that cos(360°−θ)=cos θ
=cos(90°−θ)
=sinθ
Allied angles:-
If The sum of two angles is either zero or multiple of 90° then they are called Allied angles
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