3 years ago

I need help with:

Mathematics

1 answer:

lutik1710 [3]3 years ago

7 0

Answer:

7(x+3) or 7x+21

Step-by-step explanation:

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Triangles ABC and ADC are shown below. Paul claims that triangles ABC and ADC are congruent.

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Answer:

1 no

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The perimeter of a rectangle is 42 inches. If the width of the rectangle is 8 inches, what is the length?

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A weighted coin has a 0.599 probability of landing on heads. What is the probability that it takes 5 flips for the first head to

natka813 [3]

Answer:

0.411^5 times 0.599

Step-by-step explanation:

0.599 chance of landing on heads.

0.411 chance of not landing on heads.

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How can the Pythagorean Identity be used to find sin θ, cos θ, or tan θ and the quadrant location of the angle?

Archy [21]

First lets see the pythagorean identities

$sin^2 \Theta + cos^2 \Theta =1$

So if we have to solve for sin theta , first we move cos theta to left side and then take square root to both sides, that is

$sin^2 \Theta = 1-cos^2 \Theta => sin \theta = \pm \sqrt{1-cos^2 \Theta}$

Now we need to check the sign of sin theta

First we have to remember the sign of sin, cos , tan in the quadrants. In first quadrant , all are positive. In second quadrant, only sin and cosine are positive. In third quadrant , only tan and cot are positive and in the last quadrant , only cos and sec are positive.

So if theta is in second quadrant, then we have to positive sign but if theta is in third or fourth quadrant, then we have to use negative sign .

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