At which quadrants three identities of trignometry are applicable
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Key Takeaways
The Pythagorean identities are derived from the Pythagorean theorem, and describe the relationship between sine and cosine on the unit circle.
The three identities are cos2t+sin2t=1 t + sin 2 , 1+tan2t=sec2t 1 + tan 2 t = sec 2 , and 1+cot2t=csc2t 1 + cot 2 t = csc 2
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in first quadrant all the trignometric identities are applicable
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