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Butoxors [25]
3 years ago
13

Cho 4 điểm ABCD thỏa mãn điều kiện AB//CD; AD//BC. Gọi P và Q lần lượt là trung điểm của DC và BC. Gọi M là trung điểm của AB. G

ọi E, F lần lượt là giao điểm của BD với AP và CM; O là giao điểm của AC và BD.
a) Chứng minh O là trung điểm của AC và BD.
b) Chứng minh C, F, M thẳng hàng.
c) Chứng minh DE = EF = FB.
Mathematics
1 answer:
lina2011 [118]3 years ago
4 0

Answer:

i dont even know this language

Step-by-step explanation:

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The equation of the line of best fit is y=3x+2. x=the number of ice cream sales and y= the number of days. Answer the following
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Step-by-step explanation:

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mafiozo [28]
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In a right triangle, if sin 0 = 8/17 what is cos 0 explain?
Oliga [24]

Answer:

We have sin² x + cos² x =1 for all real x.

Therefore, sin² x = 1 – cos² x = 1 – (8/17)² = 1 – 64/289 = 225/289 = (15/17)².

However, remember that if x² = a², then x can be +a or –a.

Therefore, sin x can be either –15/17 or +15/17.

Everyone but Anirban so far has forgotten the negative solution.

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Given that sinθ=817 and cosθ<0 , we have: cosθ=−√1−sin2θ. cosθ=−√1−(817)2. cosθ=−√1−64289.

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