3 years ago

What is is a mean in math

2 answers:

5 0

It’s the average. To work it out you add all the numbers and then divide it by how many there are. So 1,1,1,1 would be 1+1+1+1=4 then you divide 4 by 4 to get 1. So the mean of those numbers is 1

ivann1987 [24]3 years ago

3 0

Answer:

Step-by-step explanation:

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Varvara68 [4.7K]

Answer:

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5 0

2 years ago

TanA+tanB+tanAtanB=1 If A+B=45 degree

djyliett [7]

Answer:

See below

Step-by-step explanation:

$\tan A+\tan B + \tan A.\tan B = 1\\\\ \implies \: \tan A + \tan B = 1 - \tan A.\tan B \\ \\ \implies \: \frac{\tan A + \tan B}{ 1 - \tan A.\tan B } = 1\\ \\ \implies \: \tan (A + B) = 1 \\ \\ \implies \: \tan (A + B) =\tan 45 \degree \\ \\ \implies \: A + B = 45 \degree \\ \\ thus \: proved$