2 years ago

PLEASE ANSWER I NEED TO FINISH THESE TWO QUESTIONS, thank you

Mathematics

1 answer:

Serggg [28]2 years ago

6 0

Answer:

Look It Up On Google Shhhh Don't Tell

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Her average time was 8.1 minutes per mile.

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Simplify the left side of equation so it looks like the right side. cos(x) + sin(x) tan(x) = sec (x)

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Consider LHS

$\cos(x) + \sin(x) \tan(x) = \sec(x)$

Apply quotient identies

$\cos(x) + \sin(x) \times \frac{ \sin(x) }{ \cos(x) } = \sec(x)$

Multiply the fraction and sine.

$\cos(x) + \frac{ \sin {}^{2} (x) }{ \cos(x) } = \sec(x)$

Make cos x a fraction with cos x as it denominator.

$\cos(x) \times \cos(x) = \cos {}^{2} (x)$

$\frac{ \cos {}^{2} (x) }{ \cos(x) } + \frac{ \sin {}^{2} (x) }{ \cos(x) } = \sec(x)$

Pythagorean Identity tells us sin squared and cos squared equals 1 so

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Apply reciprocal identity.

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