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astra-53 [7]
3 years ago
15

Verify this trig function. tanysiny = secy-cosy ?

Mathematics
1 answer:
avanturin [10]3 years ago
6 0
LHS\\ \\ =\tan { y } \sin { y } \\ \\ =\frac { \sin { y }  }{ \cos { y }  } \cdot \sin { y }

\\ \\ =\frac { \sin ^{ 2 }{ y }  }{ \cos { y }  } \\ \\ =\frac { 1-\cos ^{ 2 }{ y }  }{ \cos { y }  }

\\ \\ =\frac { 1 }{ \cos { y }  } -\frac { \cos ^{ 2 }{ y }  }{ \cos { y }  } \\ \\ =\sec { y } -\cos { y } \\ \\ =RHS
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A painter charges $15.53 per hour, plus an additional amount for the supplies. If he made $157.80 on a job where he worked 5 hou
Bingel [31]

Answer:

$80.15

Step-by-step explanation:

We can make an equation to solve this problem, that helps a lot. If h represented hours, we could make the equation 15.53h+s=157.8

Now we know that he worked 5 hours, so we can multiply 15.53 by 5 to simplify the equation.

15.53*5=77.65

So now the equation is 77.65+s=157.8.

Now, we can subtract 77.65 from both sides.

So now, our final equation is s=80.15

It cost $80.15 to buy supplies.

Hope this helps!

6 0
3 years ago
The line ab has midpoint (-2, 4) a has coordinates (3, -2) find the coordinates of b
damaskus [11]

Answer:

b = (- 7, 10 )

Step-by-step explanation:

Given the endpoints (x₁, y₁ ) and (x₂, y₂ ) then the midpoint is

[ \frac{1}{2} (x₁ + x₂ ), \frac{1}{2} (y₁ + y₂ ) ]

let the coordinates of b = (x, y ) then use the formula and equate to the coordinates of the midpoint, that is

\frac{1}{2} (x + 3) = - 2 ( multiply both sides by 2 )

x + 3 = - 4 ( subtract 3 from both sides )

x = - 7

\frac{1}{2} (y - 2) = 4 ( multiply both sides by 2 )

y - 2 = 8 ( add 2 to both sides )

y = 10

Thus the coordinates of b are (- 7, 10 )

6 0
3 years ago
Jessica walks 7 times as far to school as Taylor does . Jessica walks 5 miles. How many miles does Taylor walk?
Kaylis [27]

Answer:

Step-by-step explanation:

Jessica: 5 miles

Taylor: 5/7 = .7143 miles

3 0
3 years ago
Find the next two terms in the sequence. 0, 1, 4, 9, . . . a. 13, 18 b. 13, 17 c. 16, 23 d. 16, 25
Roman55 [17]
Well, we knew that from 0 to 1 you add '1', from 1 to 4 you add '3', from 4 to 9 you add '5', from 9 to ? you add '7'!

So 9+7=16.

16 to ? you add 9! 16+9=25

The next 2 terms are 16 and 25.
7 0
3 years ago
Please help :30 points ​
Yuliya22 [10]

add up all the numbers, then divide by how many numbers there are.

5 0
3 years ago
Read 2 more answers
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