Related Formulas

Prove the trigonometric identity $\sec\left(x\right)=\frac{\sin\left(2x\right)}{\sin\left(x\right)}-\left(\frac{\cos\left(2x\right)}{\cos\left(x\right)}\right)$

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Trigonometric Identities

$\sin\left(2x\right)=2\sin\left(x\right)\cos\left(x\right)$
$\cos\left(2x\right)=2\cos\left(x\right)^2-1$
$\sec\left(x\right)=\frac{\sin\left(2x\right)}{\sin\left(x\right)}-\frac{\cos\left(2x\right)}{\cos\left(x\right)}$

Related Formulas:

2. See formulas

Time to solve it:

~ 0.28 s (SnapXam)