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ivanzaharov [21]
3 years ago
15

True or false: sinxcosy=1/2(sin(x+y)-cos(x+y))

Mathematics
1 answer:
Nataly [62]3 years ago
3 0
I may be wrong but I think it is "True"
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What kind of triangle is this?<br> A.obtuse<br> B.supplementary<br> C.acute<br> D.right
BigorU [14]
B, a supplementary triangle because it all adds up to 180 degrees.
3 0
3 years ago
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If mBDE = 125 what is mGDF? A) 35. B) 45. C) 55. D) 65
joja [24]
A supplmentary angle = 180°

∠BDE and ∠BDF are vertical angles, and so are congruent.

∠BDF = 125°, because ∠BDF ≅ ∠BDE.

∠CDA ≅ ∠EDF

∠CDA = 90°


<span>line BJ </span> is angle bisector of ∠CDA. ∠CDB is 1/2 of ∠CDA

∠CDA = 90°

∠CDB = 90/2
∠CDB = 45°

∠GDF is a vertical angle of ∠CDB, and it's measurement will be the same as ∠CDB.

∠GDF ≅ ∠CDB
∠CDB = 45°
∠GDF  = 45°


∠GDF  = 45° should be your answer

hope this helps
7 0
4 years ago
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How many possible outcomes are there when flipping a coin 9 times?
otez555 [7]
Each time the coin is tossed, there are two possible outcomes. The total number of possible outcomes when 9 tosses are made is given by:
2^{9}=512\ outcomes
3 0
3 years ago
Trapezoids and kites hw
miskamm [114]

Answer:

m<C = 101°

m<E = 46°

Step-by-step explanation:

*This was the only problem I could figure out so I'm sorry*

C equals 101° b/c 1/2 a circle angle equals 180° which is the line. Angle F and Angle C are corresponding interior angles (same side angles) so if both of them together should equal 180. 180 - 79 (<F) = 101 (<C).

You do the same thing to find Angle E b/c it's corresponding interior angles to Angle D.

I hope you understand this explanation

4 0
2 years ago
Why does 5xy3<br> have a degree of 4?
kolezko [41]
The degree is 4 because the term shown has TWO variables, while y has an exponent of 3, x has an exponent of 1, add the exponents of the variables to find the degree
5 0
3 years ago
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