Why does tan(45+A)tan(45-A)=1?

Thread starter rhule009
Start date Oct 17, 2006
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rhule009

Thread starter
Oct 17, 2006

could anyone explain (no calculation) how to work the following identity so could get an understanding of it thank you

tan(45+A)degrees tan(45-A)degrees=1

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neutrino

Oct 17, 2006

Use the identities for tan(a+b) and tan(a-b).

Why does tan(45+A)tan(45-A)=1?

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