3 years ago

What is the circumference of a circle if the diameter is 25 feet. Show answer as a decimal.

Mathematics

1 answer:

vitfil [10]3 years ago

4 0

Answer:

Step-by-step explanation:

C≈78.54 i think

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Sin 3pi divided by 4

KATRIN_1 [288]

Sin 3pi/4 is angle 135 degrees or 45 degrees below 180 degrees. Hence it's opposite side is 1 and adjacent is 1, implying the hypothenus is sqrt(2). Hence

Sin 3pi/4 = 1/sqrt(2). Now multiply by sqrt(2)/sqrt(2) to get:

[1/sqrt(2).] * [sqrt(2)/sqrt(2)] = sqrt2)/2

6 0

3 years ago

Factorise each of the following<br> a2+9a+8

Tanzania [10]

Answer:

Step-by-step explanation:

I suppose the expression is this $a^2+9a+8.$