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2 years ago

What is the equation of this line? a. y= -2

Mathematics

1 answer:

jeyben [28]2 years ago

5 0

The answer is y = 2x

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If 20% of a number is 386, what will be 30% of the same number

pav-90 [236]

if the 20% of a number is 386, what will be 30% of the same number

Answer will be 157

4 0

2 years ago

Read 2 more answers

What is the measure of 27? 13 4 1370 A 330 B. 1370 430 D 470

finlep [7]

Answer:

B. yes.

Step-by-step explanation:

dd_rrdrdy]uuhhhgffdddddddddddddddddddddd

4 0

2 years ago

Find the 8th term of the sequence with formula tn= 7+2 (n-1)

stellarik [79]

Answer:

Your answer is 71

Step-by-step explanation:

7+2(n-1)

we have our n as 8

so,7+2(8-1)

9(7)=63

3 0

11 months ago

If the plane climbed 242 more feet at an angle of 2° degrees. How much further did the plane travel to reach its maximum height

melomori [17]

Answer:

244

Step-by-step explanation:

8 0

2 years ago

Simplify: cos2x-cos4 all over sin2x + sin 4x

GrogVix [38]

Answer:

$\frac{\cos\left(2x\right)-\cos\left(4x\right)}{\sin\left(2x\right)+\sin\left(4x\right)}=\tan\left(x\right)$

Step-by-step explanation:

$\frac{\cos\left(2x\right)-\cos\left(4x\right)}{\sin\left(2x\right)+\sin\left(4x\right)}$

Apply formula:

$\cos\left(A\right)-\cos\left(B\right)=-2\cdot\sin\left(\frac{A+B}{2}\right)\cdot\sin\left(\frac{A-B}{2}\right)$ and

$\sin\left(A\right)+\sin\left(B\right)=2\cdot\sin\left(\frac{A+B}{2}\right)\cdot\sin\left(\frac{A-B}{2}\right)$

We get:

$=\frac{-2\cdot\sin\left(\frac{2x+4x}{2}\right)\cdot\sin\left(\frac{2x-4x}{2}\right)}{2\cdot\sin\left(\frac{2x+4x}{2}\right)\cdot\cos\left(\frac{2x-4x}{2}\right)}$

$=\frac{-\sin\left(\frac{2x-4x}{2}\right)}{\cos\left(\frac{2x-4x}{2}\right)}$

$=\frac{-\sin\left(\frac{-2x}{2}\right)}{\cos\left(\frac{-2x}{2}\right)}$

$=\frac{-\sin\left(-x\right)}{\cos\left(-x\right)}$

$=\frac{-\cdot-\sin\left(x\right)}{\cos\left(x\right)}$

$=\frac{\sin\left(x\right)}{\cos\left(x\right)}$

$=\tan\left(x\right)$

Hence final answer is

$\frac{\cos\left(2x\right)-\cos\left(4x\right)}{\sin\left(2x\right)+\sin\left(4x\right)}=\tan\left(x\right)$

6 0

2 years ago