(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

My calculator shows tan 6. tan 42. tan 66. tan 78 =1

Ho is this possible?

2. Relevant equations

tan (90-x)=cot x

3. The attempt at a solution

but these angles are not supplementary. Ho is this possible?

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# Homework Help: Product=1 homework question

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