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Homework Statement
My calculator shows tan 6. tan 42. tan 66. tan 78 =1
Ho is this possible?
Homework Equations
tan (90-x)=cot x
The Attempt at a Solution
but these angles are not supplementary. Ho is this possible?
so how did you solve it? any hints?thanks all. I got this in a book called brain teasers. I have solved it myself. thanks for all the help!
ooh, kamerling, that's clever!cos 12 cos 24 cos 48 cos 96 = -1/16
I got this from the following equations:so how did you solve it? any hints?