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1 year ago

Multiply (1/3√x-3/2√y)^2

Mathematics

1 answer:

lisov135 [29]1 year ago

8 0

Answer: multiply (1/3√x-3/2√y)^2

Step-by-step explanation: Answer: 1/2 of 1/2 is 1/4.

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Help please!

Mamont248 [21]

Answer: see proof below

Step-by-step explanation:

Use the Sum & Difference Identity: cos (A + B) = cos A · cos B - sin A · sin B

Recall the following from Unit Circle: cos (π/2) = 0, sin (π/2) = 1

cos (π) = -1, sin (π) = 0

Use the Quotient Identity: $\tan A=\dfrac{\sin A}{\cos A}$

Proof LHS → RHS:

$\text{LHS:}\qquad \qquad \dfrac{\cos \bigg(\dfrac{\pi}{2}+x\bigg)}{\cos \bigg(\pi +x\bigg)}$

$\text{Sum Difference:}\qquad \dfrac{\cos \dfrac{\pi}{2}\cdot \cos x-\sin \dfrac{\pi}{2}\cdot \sin x}{\cos \pi \cdot \cos x-\sin \pi \cdot \sin x}$

$\text{Unit Circle:}\qquad \qquad \dfrac{0\cdot \cos x-1\cdot \sin x}{-1\cdot \cos x-0\cdot \sin x}$

$=\dfrac{-\sin x}{-\cos x}$

Quotient: tan x

LHS = RHS $\checkmark$

7 0

3 years ago

Read 2 more answers

When 2 times a number is increased by 9 the answer is the same as when 30 is decreased by the number

galben [10]

Answer:

(2*n)+9=n-30

Step-by-step explanation:

I'm not sure but I think that is the equation

8 0

3 years ago

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Are these fractions equivalent or nonequivalent? xy/4y x/4

Nina [5.8K]

Answer:

They are equivalent

Step-by-step explanation:

x/4 multiplied by y/y equals to xy/4y. Therefore, they are equivalent

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2 years ago

Which fractions are equivalent to 4/9?

LenaWriter [7]

Answer:

$\frac{8}{18}$

Step-by-step explanation:

$\frac{4}{9} = \frac{4 \times 2}{9 \times 2} = \frac{8}{18} \\$

5 0

2 years ago

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Jane drives at a constant rate of 45 miles per hour for 4 hours. How far will she have traveled in that time?

bearhunter [10]

180 miles per hour. 45*4 to get the answer.

6 0

3 years ago