4 years ago

Jennifer has 3 brothers. Mark is older than Jennifer, but he is not the oldest.

1 answer:

Elza [17]4 years ago

8 0

Jennifer I would say

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Verified

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Use $\tan{x}=\frac{\sin{x}}{\cos{x}}$ , $\sin^2{x}+\cos^2{x}=1$ and $\sec{x}=\frac{1}{\cos{x}}$

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