$\bf tan^2(x)-1=0\implies tan^2(x)=1\implies tan(x)=\pm\sqrt{1} \\\\\\ tan^{-1}[tan(x)]=tan^{-1}(\pm 1)\implies x=tan^{-1}(\pm 1)\implies x= \begin{cases} \frac{\pi }{4}\\\\ \frac{3\pi }{4}\\\\ \frac{5\pi }{4}\\\\ \frac{7\pi }{4} \end{cases}$

5 0

3 years ago

Find the percent of increase.<br> Original number: 45 books<br> New number: 63 books

BARSIC [14]

Answer:

Step-by-step explanation:

first you multiply 45 by .40 you multiply by .40 because that is the percent increase.

45*.40=18

then you just add the 18 to 45 which get you 63.

answer:40%

7 0

3 years ago

Write your answer simplified, please.

Ede4ka [16]

Answer:

1.6

Step-by-step explanation:

1.6

6 0

3 years ago

Read 2 more answers

Solve the inequality 3x - 5

SSSSS [86.1K]

The anwser would be -15
3 x (-5) = -15

4 0

3 years ago