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Neporo4naja [7]
3 years ago
5

Please help i need answer and explanation.please help meee..

Mathematics
1 answer:
babunello [35]3 years ago
8 0

Answer:

90 an right angle

Step-by-step explanation:

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Identify the triangle that contains an acute angle for which the sine and cosine ratios are equal.
algol13

Answer:

i need the diagram

Step-by-step explanation:

plz

3 0
3 years ago
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The question is attached
DerKrebs [107]

cos(A - B) = cos A cos B + sin A sin B

In this case, A is \frac{\pi }{3} and B is \frac{\pi }{5}, so:

  cos\frac{\pi}{3} cos\frac{\pi}{5} +sin\frac{\pi }{3} sin\frac{\pi }{5} =cos(\frac{\pi}{3} -\frac{\pi}{5} ) = cos\frac{2\pi}{15}

Hope that helps!

5 0
2 years ago
The sine function is an odd function
Agata [3.3K]
Sure the sin function is an odd function because sin (-Ф) = - sin (Ф)
Example: sin (- 30°) = - sin (30°) = -1/2

8 0
4 years ago
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Mrs.Stone is three times older than her younger daughter, Joyce, but only two times older than her older daughter, Alex. How old
olchik [2.2K]

Answer:

54 years

Step-by-step explanation:

Joyce age = x

Alex age = y

3x = 2y - - - (1)

y - 9 = 2(x - 9)

y - 9 = 2x - 18

-9 + 18 = 2x - y

9 = 2x - y

y = 2x - 9 - - (2)

3x = 2y

3x = 2(2x - 9)

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5 0
3 years ago
If LMNO is a rectangle, and mMON = 30, what is the value of x?
sladkih [1.3K]

Answer:

The answer is the option E

120\°

Step-by-step explanation:

we know that

If LMNO is a rectangle

then

The triangle OCN is an isosceles triangle----> (C is the center of the rectangle)

so

m ------> the base's angles of the isosceles triangle

m -----> by vertical angles

Remember that the sum of the internal angles of a triangle must be equal to 180\°

therefore

2*30\°+x\°=180\°

solve for x

x=180\°-2*30\°=120\°

6 0
3 years ago
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