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Darina [25.2K]
3 years ago
13

Trig question -- please help if you can!

Mathematics
1 answer:
yanalaym [24]3 years ago
4 0
\bf \textit{Sum and Difference Identities}
\\\\
sin(\alpha + \beta)=sin(\alpha)cos(\beta) + cos(\alpha)sin(\beta)
\\\\
cos(\alpha + \beta)= cos(\alpha)cos(\beta)- sin(\alpha)sin(\beta)\\\\
-------------------------------\\\\
y=r[cos(\theta +R)]\implies y=r[cos(\theta )cos(R)-sin(\theta )sin(R)]
\\\\\\
y=rcos(\theta )cos(R)-rsin(\theta )sin(R)
\\\\\\
z=r[sin(\theta +R)]\implies y=r[sin(\theta )cos(R)+cos(\theta )sin(R)]
\\\\\\
z=rsin(\theta )cos(R)+rcos(\theta )sin(R)
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I went to the store and bought 0.89 pounds of apples. Apples cost $1.39 a pound. How much did i pay for apples?
Elena L [17]
If you bought 0.89 pounds at $1.39 per pound, the total cost was
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You paid $1.24 for the apples
7 0
4 years ago
Need help due asap. n.
sergey [27]

Answer:

y = -3x + 1

Step-by-step explanation:

y = -3x + 1

y = -3 . -2 + 1

= 6 + 1

y = 7

y = -3x + 1

y = -3 . 2 + 1

= -6 + 1

= -5

y = -3x + 1

= -3 . 4 + 1

= -12 + 1

= -11

so, it should be y = -3x + 1

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6 0
3 years ago
6) Which type of transformation creates an image where the area of the shape changes? A) translations B) rotations C) reflection
Simora [160]

The transformation that changes the area of a shape is dilation (Option D)

Step by step explanation

Option A: Translation

A translation is a geometric transformation that moves every point of a figure, shape, or space by the same distance in a given direction. For this type, the image is congruent with the original shape.

Option B: Rotation

A rotation is a type of transformation that takes each point in a figure and rotates it a certain number of degrees around a given point. For this type, the image is congruent with the original shape.

Option C: Reflection

A reflection is a transformation where each point in a shape appears at an equal distance on the opposite side of a given line - the line of reflection. For this type, the image is congruent with the original shape.

Option D: Dilations

Dilation in math is a transformation that changes the size of a figure so it becomes larger or smaller without changing shape. This type changes the area since the area is the size of a figure.

6 0
1 year ago
What is the simplified form of 3(5V3 + 3V3)?
Rasek [7]

Answer:

24 \sqrt{3}

Step-by-step explanation:

3(5 \sqrt{3}  + 3  \sqrt{3} ) \\  \\  = 3(5  + 3 )  \sqrt{3} \\  \\ = 3(8)  \sqrt{3} \\  \\  = 24 \sqrt{3}

8 0
3 years ago
In the triangle below, x=7 yards. What is the value of y
victus00 [196]

Answer: \\  \tan(30°)  =  \frac{x}{y}  =  \frac{7}{y}  \\ \Leftrightarrow y =  \frac{7}{ \tan(30°) }  =  \frac{7}{ \frac{1}{ \sqrt{3} } }  = 7 \sqrt{3}  \: yards

7 0
3 years ago
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