What is the least common denominator of 8/9 + 4/7?

Mathematics

2 answers:

anzhelika [568]3 years ago

8 0

You have to find lcd so, 7x9=63 9x7=63, so the answer is 12/63, after you simplify it is 4/21

SVEN [57.7K]3 years ago

7 0

Do you mean LCM (Least common multiple)

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How to verify frac(sec theta/ csc theta- cot theta -frac(sectheta/csc theta +cot theta = 2csc theta

drek231 [11]

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$\frac{sec \theta( csc \theta+cot \theta)}{ (csc \theta- cot \theta)( csc \theta+ cot \theta) }-\frac{sec \theta( csc \theta- cot \theta)}{( csc \theta- cot \theta)(csc \theta +cot \theta)} \\ =\frac{sec \theta csc \theta+sec \theta cot \theta-sec \theta csc \theta+sec \theta cot \theta}{ csc^2 \theta- cot^2 \theta }$
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7 0

3 years ago

Why is the product of a rational number and an irrational number Irrational?

Llana [10]

Answer:

Because the product is always non-termination,non-repeating decimal.

Step-by-step explanation:

If we have $a$ is irrational; $b$ is rational such that $b \neq 0$ , then $a \cdot b$ is irrational.