Trigonometry Ratios of Allied Angles (Trick) #jeedailyconcepts #trigonometry

If the sum or difference of 2 angles is a multiple of 90 degrees, then the angles are known as the allied angles. To find the trigonometric ratio of an allied angle, you can first identify the quadrant it is in, and then whether the sum/difference is even or odd multiple of 90 degrees.

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[vireshsharma]

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