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3 years ago

If sinxcos(pi/7)-sin(pi/7)cosx=-sqrt2/2 then x can equal?

2 answers:

8 0

I'm going for a range of 0 < x <2π

This is R sin (x-a), although R is 1.

a = π/7, so

=> sin (x-(π/7)) = -1/(sqrt(2))
=> x = 53π/28, 39π/28

Arlecino [84]3 years ago

4 0

Answer:

its's 5pi/4 +pi/7 and 3pi/4+pi/7

Step-by-step explanation:

Just took the quiz on A P E X

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Vinvika [58]

Put one point at -10,6 and another at 6,-10

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3 years ago

(- 1/2 + 3/4 ) 1/5

marta [7]

I hope this helps you

(-2/4+3/4).1/5

1/4.1/5

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3 years ago

What is the solution to the following system of equations? 4x + 2y = 18 x − y = 3

Ber [7]

For this case we have the following system of equations:

$4x + 2y = 18\\x-y = 3$

To solve, we clear "x" from the second equation:

$x = 3 + y$

We substitute "x" in the first equation:

$4 (3 + y) + 2y = 18\\12 + 4y + 2y = 18\\12 + 6y = 18$

We clear the value of the variable "y":

$6y = 18-12\\6y = 6\\y = \frac {6} {6}\\y = 1$

We look for the value of the variable "x":

$x = 3 + y\\x = 3 + 1\\x = 4$

Thus, the solution of the system is given by:

$(x, y) :( 4,1)$

Answer:

$(x, y) :( 4,1)$

Option D

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3 years ago

According to the Bohr model, the radius of a hydrogen atom is approximately 5.29 × 10-11 meters.

andrezito [222]

Simplify the expression:
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7 0

3 years ago

Read 2 more answers

The Super Bowl half time show lasts 30 minutes. If the half time show is 1/7 of the total game time, how many hours is the Super

gtnhenbr [62]

Answer:

3 1/2 hours.

Step-by-step explanation:

If the Half Time show is one-seventh of the show and lasts for 30 minutes, we can multiply that by 7 to get the total amount of minutes.

30 x 7 = 210

To convert the number of minutes to hours, 210 can be divided by 60 to result in a total of 3.5, therefore, the Super Bowl lasts for 3 1/2 hours.

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3 years ago