All formula of Trignometric Identities​

Answer:

x = 25

Step-by-step explanation:

Since ∠ A = ∠ B then the triangle is isosceles and AC = BC , that is

4x - 30 = 2x + 20 ( subtract 2x from both sides )

2x - 30 = 20 ( add 30 to both sides )

2x = 50 ( divide both sides by 2 )

x = 25

Step-by-step explanation:

x=11

hope it helps.

comment me if im correct then i will post step by step

and sorry, if im incorrect.

Answer:

-35

Step-by-step explanation:

X's cancel out each other

-10+-25

Answer:

We want to rewrite:

sin^4(x)

in a way that only involves the first power of the cosine function.

We know that:

sin^2(x) = 1 - cos^2(x)

Then:

sin^4(x) = sin^2(x)*sin^2(x) = sin^2(x)*(1 - cos^2(x))

Now we know that:

cos(2x) = cos^2(x) - sin^2(x)

then

cos(2x) + sin^2(x) = cos^2(x)

We can replace that in our equation to get:

sin^2(x)*(1 - cos^2(x)) =  sin^2(x)*(1 - cos(2x) - sin^2(x) )

sin^2(x)*(1 - cos(2x) - sin^2(x) ) = sin^2(x) - sin^2(x)*cos(2x) - sin^4(x)

then:

sin^4(x) =  sin^2(x) - sin^2(x)*cos(2x) - sin^4(x)

sin^4(x) + sin^4(x) =   sin^2(x) - sin^2(x)*cos(2x)

2*sin^4(x) =  sin^2(x) - sin^2(x)*cos(2x)  = sin^2(x)*(1 - cos(2x))

sin^4(x) = sin^2(x)*(1 - cos(2x))/2

So we rewrite the equation in such a way that we only have the first power of the cosine function.

Step-by-step explanation:

[tex]{ \huge {\underline {\underline {\mathtt {\red{♡Answer}}}}}}[/tex]

=> X - 2 = -8

=> X=(-6) - 2

=> -8

Answer:

x = -6

Step-by-step explanation:

x - 2 = -8

Add 2 to both sides to isolate the variable, x.

x - 2 + 2 = -8 + 2

-2+2 = 0

-8+2 = -6

Therefore,

x = -6

Check:

-6 -2 = -8

Hope this helps

Answer:

1.918

Step-by-step explanation:

1 then do 459/500 x 2 to make 918/1000 then add and convert

Answer:

6 students.

Step-by-step explanation:

3v +  c = 22  ---> c = 22 - 3v

2v + 4c = 28 ---> 2v + 4(22 - 3v) = 28

                         2v + 88 - 12v = 28

                       -10v + 88 = 28

                               - 88  - 88

                        - 10v = - 60

                              v = 6 students

Answer: 14.1

Step-by-step explanation:

Answer:

GCF: 2x

Factored: 2x(x+3)(x-3)

Step-by-step explanation:

Answer:

The GCF of 40x and 25 is 5.

Step-by-step explanation:

5 goes into both 40 and 25.

Answer:

8x^2+122x-481

Step-by-step explanation:

you need to multiply these together to simplify.

(4x-13)(2x+37)

8x^2+148x-26x-481

8x^2+122x-481

not sure if this is what you were asking or if it needed to be graphed or what but i hope this helps?

Answer:

5

Step-by-step explanation:

15+5=20

Answer: I am pretty sure it is 2/1

Step-by-step explanation: rise/run

Answer:

$36.38

Step-by-step explanation:

If the sales tax rate is 7% in New York, then how much sales tax would you pay in New York for a $34 pair of pants?

Given data

Tax= 7%

Cost = $34

Let us solve for the amount of tax

=7/100*34

=0.07*34

=2.38

Hence the total is =2.38+34

=$36.38

Answer:

1.6f + 0.4j - 13

Step-by-step explanation:

Answer:

1.6f+0.4j-13

Step-by-step explanation:

-1.3f + 0.4j - 12 - 1 + 2.9f

Combine like terms

-1.3f+2.9f     +0.4j    -12-1

1.6f+0.4j-13

Answer:

Alternate Interior ∠s: 3 & 5, 4 & 6.

Corresponding ∠s: 1 & 5, 2 & 6, 3 & 8, 4 & 7.

Alternate Exterior ∠s: 1 & 8, 2 & 7.

Consecutive ∠s: 3 & 6, 4 & 5.

Step-by-step explanation:

Alternate interior angles must both be in between the parallel lines, it is almost like you are flipping the angle over the line, then moving it down, if that makes any sense.

Corresponding angles correspond, which means that they are the same (of course), but it is like you go directly down to the similar angle. You can visually see that angles are the same, an example is 1 & 5.

Alternate exterior angles are similar to alternate exterior angles, but they must be on the exterior of the parallel lines. Once again, it is like you are flipping the angle of the line, then turning it downwards, if it makes any sense that way to you.

Consecutive angles are always in between the two parallel lines on the same side. They add up to 180. So 4 & 5 is a good example.

Good luck.

Answer:

58.50

Step-by-step explanation:

Hope it helps and I hope you have a wonderful rest of your day!!!! :)

Answer:

A. 17 m

Step-by-step explanation:

perpendicular (p) = 15 m

base (b) = 8 m

hypotenuse (h) = ?

We know that by using Pythagoras theorem

h = √p² + b²

= √ 15² + 8²

= √289

= 17 m

Hope it will help :)

Answer:

Sorry dude I don't know the answer.

Answer:

-1/36

Step-by-step explanation:

18=-1/(2k)

2k=-1/18

k=(-1/18)/2

k=(-1/18)(1/2)

k=-1/36

Answer:

what is it

Step-by-step explanation:

Answer:

Infinitely many solutions.

Step-by-step explanation:

Multiply the second equation by -2, then add the equations together

(20x+2y=18)

−2(10x+y=9)  

20x+2y=18

−20x−2y=−18

Add these equations to eliminate x

0=0

Infinitely many solutions.

Step-by-step explanation:

i already done it.thank you

Answer:

[tex]\vec v = 2\cdot \vec a = \langle -4,6 \rangle[/tex]

Step-by-step explanation:

Let [tex]\vec a = \langle -2, 3 \rangle[/tex], we need to determine [tex]\vec v = 2\cdot \vec a[/tex], which can be found by applying the following property:

[tex]\alpha \cdot \langle x,y \rangle = \langle \alpha \cdot x, \alpha \cdot y\rangle[/tex], [tex]\forall \,\alpha,x,y\in \mathbb{R}[/tex] (1)

Then,

[tex]\vec v = 2\cdot \langle -2,3 \rangle[/tex]

[tex]\vec v = \langle -4,6 \rangle[/tex]

Answer:

The answer is number 3

Step-by-step explanation:

I hada this question on a quiz and i clicked this and it was rigt

Answer:

I love Math anyways

The ans is in the picture with the  steps how i got it

(hope this helps can i plz have brainlist :D hehe)

Step-by-step explanation:

Answer:

5.5

Step-by-step explanation:

2x -3 = 8

then

2x = 8 + 3 = 11

means

2x = 11

then

x = 11 ÷ 2

x = 5.5

___________________

we change the sign (- or +)

then take the number to the other side of the equal (with the changed sign)

leaving the x alone so that we can answer the equation..

_____________

to make sure

2×5.5 -3 = .....

it will be 8

Answer:

Step-by-step explanation:y=4  x=3

Answer:

4/5

Step-by-step explanation:

Multiply 4/1 and 5/1

Answer:

4/5

Step-by-step explanation:

Answer:

Yes

Step-by-step explanation:

15% of 17500 is 2625 which you would subtract of off the original price. So it would be 14875, which is less than 15000.