$\bf cot(\theta)=\cfrac{cos(\theta)}{sin(\theta)}
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sin^2(\theta)+cos^2(\theta)=1\implies cos^2(\theta)=1-sin^2(\theta)
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cos(\theta)=\pm\sqrt{1-sin^2(\theta)}\\\\
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cot(\theta)=\cfrac{cos(\theta)}{sin(\theta)}\implies cot(\theta)=\cfrac{\pm\sqrt{1-sin^2(\theta)}}{sin(\theta)}$

6 0

3 years ago

REALLY NEED ALGEBRA HELP please

lisabon 2012 [21]

A. The discriminant is 81. The formula is b^2 - 4ac.

B. 2 answer and both will be rational due to the fact that the discriminant is a perfect square.

C. Solutions are 1/2 and -4. You can find using the quadratic formula.

8 0

3 years ago

Find the area of the circle. Use 3.14 for pi. 106yd

VikaD [51]

Answer:

where is the diagram or the explanation of the circle?

4 0

3 years ago

X + 7<br> 2x - 3<br> Perimeter:<br> Area:

777dan777 [17]

Answer:

P=6x+8

A=2x^2+11x-21

Step-by-step explanation:

Perimeter:

P=2(x+7)+2(2x-3)

P=6x+8

Area:

A=(x+7)(2x-3)

A=2x^2+11x-21

7 0

3 years ago