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Exercise

$1-\sin^2\left(7x\right)$

Step-by-step Solution

1

Apply the trigonometric identity: $1-\sin\left(\theta \right)^2$$=\cos\left(\theta \right)^2$, where $x=7x$

$\cos\left(7x\right)^2$
Why is 1 - sin(x)^2 = cos(x)^2 ?

Final answer to the exercise

$\cos\left(7x\right)^2$

Try other ways to solve this exercise

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  • Find the derivative
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  • Verify if true (using algebra)
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  • Product of Binomials with Common Term
  • FOIL Method
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