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Exercise

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

Step-by-step Solution

1

Applying the trigonometric identity: $1-\sin\left(\theta \right)^2 = \cos\left(\theta \right)^2$

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

Final answer to the exercise

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

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