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If f(x)=1-x/1+x then f[f(cos2θ)] |
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Answer» -STEP EXPLANATION:(1-COS(2))/(1+cos(2)) can be written nicely as [2 sin² (1)]/[2 cos² (1)] which is tan²(1)Now, (1-tan²(1))/(1+tan²(1)). The top is cos(2)sec²(1) and the bottom is just sec²(1), so the secants CANCEL leaving, just cos(2) |
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