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nikdorinn [45]
3 years ago
12

What is formula of sec(A+B)​

Mathematics
1 answer:
Natasha2012 [34]3 years ago
8 0

Answer:

(cos a cos b - sin a sin b)

Step-by-step explanation:

It's easy

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Elena-2011 [213]

Answer:

Step-by-step explanation:

1. 5, 3.5, \sqrt{9\\}, -\frac{12}{5}, -7

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Slope of AB=(2-3)/(1+1)=-1/2; AC=(-1-3)/(-3+1)=-4/-2=2; BC=(-1-2)/(-3-1)=-3/-4=3/4.
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3 years ago
A polygon has the following coordinates: A(3,1), B(5,3), C(2,5), D(-1,5), E(-4,3), F(-2,1). Find the length of DC.
nlexa [21]

To find the length of a line given two points, we are going to use the distance formula, which is defined below:

D = \sqrt{(x_2 - x_1)^2 + (y_2 - y_1)^2}

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The points in this problem are (2, 5) and (-1, 5). We can find the distance of DC by substituting these values into the distance formula and simplifying, as shown below:

D = \sqrt{(-1 - 2)^2 + (5 - 5)^2

  • Substitute values into formula

D = \sqrt{(-3)^2}

  • Combine like terms and then simplify 0^2 to 0

D = \sqrt{9}

  • Compute (-3)^2 = 9

D = 3

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3 years ago
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Answer:

  -1 < x < 2

Step-by-step explanation:

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3 years ago
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