Work out the estimate of books brought. On the y axis it is number of students.

Mathematics

1 answer:

Solnce55 [7]3 years ago

8 0

Answer:

8 books

Step-by-step explanation:

The answer is 8 because you add up all of the bars which get you to 40
Finally you divide 40 by the number of bars which gets you 5. 40/5=8
Hope this helped :)

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Eduardwww [97]

Answer:

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Step-by-step explanation:

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2 years ago

Prove that : 1/1-secA + 1/1+secA = -2cot^2A

irina1246 [14]

Answer:

Step-by-step explanation:

LHS = 1/1-secA + 1/1+secA

$= \frac{1*(1+Sec A)}{(1-Sec A)(1+Sec A)}+\frac{1*(1-Sec A)}{(1+Sec A)*(1-Sec A)}\\\\=\frac{(1+Sec A)}{1-Sec^{2} A}+\frac{(1-Sec A)}{1-Sec^{2} A}\\\\=\frac{1+Sec A+1-Sec A}{(1-Sec^{2} A)}\\\\= \frac{2}{(1-Sec^{2} A)}\\\\=\frac{2}{-(Sec^{2} A - 1)}\\\\= \frac{-2}{Tan^{2} A}\\\\= -2Cot^{2} A$