perplexus.info :: Just Math : Trig trick

Trig trick (Posted on 2002-11-07)

Prove that

sin² x + cos² x = 1

See The Solution Submitted by Dulanjana

Rating: 2.4545 (11 votes)

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duh

| Comment 7 of 13 |

They equal one because they are opposing ratios.

Works for every real number. Easy.

Posted by Drew on 2003-10-09 20:12:44

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