allied angles trignometry
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allide angles : The angles whose sum is 90 degrees
Ex : 30,60 ; 36,54 etc...
Ex : 30,60 ; 36,54 etc...
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Trigonometric ratios of allied angles, when the sum or difference of two angles is either zero or a multiple of 90 . For example 30 and 60 are allied angles because their sum is 90
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