For tan(405 degrees):
405° = 360° + 45° = 45° = 9π/4 = π/4
tanx = sinx/cosx
sin(π/4) = √2/2
cos(π/4) = √2/2
[√2/2] / [√2/2] = 1
Therefore: tan(405°) = 1
You may use the same method for the other given functions.
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