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OpenStudy (anonymous):
use the angle sum or difference identity to find the exact value of tan 255 tan(225+30) I need some help with this one
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OpenStudy (cwrw238):
use the identity tan (a + b) = tan a + tan b -------------- 1 - tan a tan b
OpenStudy (cwrw238):
just a sec while a check that is correct
OpenStudy (cwrw238):
yes thats ok
OpenStudy (cwrw238):
you can find the exact values of tan 30 and tan 225 from the standard triangles:- |dw:1427878809853:dw|
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