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Exercise

$\cos\left(ag\right)-\cos\left(bg\right)$

Step-by-step Solution

1

Apply the trigonometric identity: $\cos\left(a\right)-\cos\left(b\right)$$=-2\sin\left(\frac{a-b}{2}\right)\sin\left(\frac{a+b}{2}\right)$, where $a=ag$ and $b=bg$

$-2\sin\left(\frac{ag-bg}{2}\right)\sin\left(\frac{ag+bg}{2}\right)$

Final answer to the exercise

$-2\sin\left(\frac{ag-bg}{2}\right)\sin\left(\frac{ag+bg}{2}\right)$

Try other ways to solve this exercise

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  • Integrate using basic integrals
  • Verify if true (using algebra)
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  • Product of Binomials with Common Term
  • FOIL Method
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