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3 years ago

Solve 1 And 2 Step Equations.

Mathematics

1 answer:

Andrei [34K]3 years ago

3 0

W 678876? Tried the same place to see what your food is

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sin alpha = 7/25, alpha lies in quadrant ii, and cos beta = 2/5, beta lies in quadrant i. find cos(alpha-beta).

Ilia_Sergeevich [38]

Answer:

Therefore $\cos(\alpha-\beta)=\frac{48+7\sqrt{25}}{125}$

Step-by-step explanation:

Given values are

$\sin \alpha=\frac{7}{25}$

$\cos \beta=\frac{2}{5}$

$\sin^2x+\cos^2=1$

$\cos \alpha=\sqrt{1-\sin^2\alpha}$

$\cos \alpha=\sqrt{1-(\frac{7}{25})^2}$

$\cos \alpha=\sqrt{1-\frac{49}{625}}$

$\cos \alpha=\sqrt{\frac{576}{625}}$

$\cos \alpha=\frac{24}{25}$

$\sin \beta=\sqrt{1-\cos^2\beta}$

$\sin \beta=\sqrt{1-(\frac{2}{5})^2}$

$\sin \beta=\sqrt{1-\frac{4}{25}}$

$\sin \beta=\frac{\sqrt{21}}{5}$

$\cos(\alpha-\beta)=\cos\alpha\cos\beta+\sin\alpha\sin\beta$

$\cos(\alpha-\beta)=\frac{24}{25}\times\frac{2}{5}+\frac{7}{25}\times\frac{\sqrt{21}}{5}$

$\cos(\alpha-\beta)=\frac{48+7\sqrt{25}}{125}$

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2 years ago

Can someone please help me with this

rjkz [21]

Answer:

Each point reflected across the x-axis, goes from (x, y) --> (x, -y), which means that we keep the x coordinate the same, but multiply the y coordinate by -1:

L (-2, 4) --> (-2, -4)

M (2, 1) --> (2, -1)

N (-4, -3) --> (-4, 3)

Step-by-step explanation:

6 0

2 years ago

I NEED THE ANSWER ASAP PLEASEEEE

drek231 [11]

Well, I need a picture

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2 years ago

Read 2 more answers

2) If 3/5 of students carry an iPhone, what fraction of students is this using 75 as the denominator

kkurt [141]

Answer:

45/75

Step-by-step explanation:

75/5 = 15

15x3 = 45

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2 years ago

2. Given AMAR, solve for the m&M. Round to the

Naddik [55]

Answer:

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Step-by-step explanation:

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3 years ago