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Double angle indentities?

Here is the problem: http://i20.tinypic.com/316vui9.jpg
a. 0°
b. 45°, 135°
c. 90°
d. 0°, 90°
Thanks for the help!

2007-11-04 06:20:59 · 1 answers · asked by sillyboys_trucksare4girls 2 in Science & Mathematics ➔ Mathematics

*identities, not indentities, sorry

2007-11-04 06:21:22 · update #1

1 answers

tan(2x) = tan(x)
The only answer is x = 0 degrees

2007-11-04 06:32:00 · answer #1 · answered by ironduke8159 7 · 0⤊ 0⤋

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