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3 years ago

9

I need help with a (the circled one) tha asks find the length of XZ

1 answer:

Nookie1986 [14]3 years ago

8 0

8.261(rounded) is the length of XZ, because by dividing the triangle in half, we know that YX=2 and XY=8.5. By applying the Pythagorean Theorem, 8.5^2 -2^2=8.261^2

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<h3> $\sec \alpha \sqrt{1 - \sin ^{2} \alpha } = 1$ </h3>

Prove the LHS

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<u>Rewrite the expression</u>

We have

<h3> $\sec \alpha \sqrt{ \cos^{2} \alpha }$ </h3>

<h3> $\sqrt{ { \cos }^{2} \alpha } = \cos \alpha$ </h3>

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<h2>1</h2>

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