3 years ago

Rút gọn biểu thức chứa căn

Mathematics

1 answer:

olya-2409 [2.1K]3 years ago

3 0

Answer:

CHENG CHANG ching ching

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0.286

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Answer: $\bold{b)\quad \dfrac{2\pi}{3},\dfrac{4\pi}{3},0}$

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Note the following identities: tan² x = sec²x - 1

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tan² x + sec x = 1

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11. Mis the midpoint of QR. Q is at (-8, 2) and M is at (4, -3). Find the coordinates of the endpoint R.

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Step-by-step explanation:

if (x1,y1) and (x2,y2) are coordinates of two points and (x,y) the coordinate of midpoint.

then x=(x1+x2)/2

and y=(y1+y2)/2

let coordinates of R are (x,y)

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