3 years ago

If BC= 6.5, CD= 7.8, and AD=12.2, find AB to the nearest tenth

1 answer:

8 0

Assuming that each of these letters are splitting this half and half (based off of the information given here) then AB would be 9.4

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Find the surface area of the regular pyramid. round to the nearest tenth if necessary.

Morgarella [4.7K]

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3 years ago

BRAINLY FOR THE FASTEST WITH GOOD EXPLANATIONS

Neporo4naja [7]

So, when we're tasked with things like this, rewriting everything in terms of sine and cosine and combining fractions often trivializes things, so doing just that gives us:

$\frac{\frac{1}{\cos{x}}-\frac{1}{\sin{x}}}{\frac{\cos{x}}{\sin{x}}-1}= \\\frac{\frac{=(\cos{x}-\sin{x})}{\cos{x}\sin{x}}}{\frac{\cos{x}}{\sin{x}}-\frac{\sin{x}}{\sin{x}}}=\\\frac{-(\cos{x}-\sin{x})}{\cos{x}\sin{x}}*\frac{\sin{x}}{\cos{x}-\sin{x}}=\\-\frac{1}{\cos{x}}$