# High school math questions and answers

Recent questions in Secondary

### How to simplify $\frac{{\mathrm{cos}}^{2}\left(\frac{\pi }{2}-x\right)}{\mathrm{cos}x}$?

bararskzs 2023-02-05

### Prove that $\frac{0.85×0.85×0.85+0.15×0.15×0.15}{0.85×0.85-0.85×0.15+0.15×0.15}=1$.

sublimnoj7u7 2023-02-05

Mara Boyd 2023-02-05

### If f(x)=x^2−1/x and g(x)=x+2/x−3, then the domain of f(x)/g(x) is...

Sanai Navarro 2023-02-05

### What is the square root of $0.4$?

Kiersten Edwards 2023-02-05

### Counting numbers are also called as: Whole numbers Natural Numbers Integers Prime Numbers

Davin Irwin 2023-02-05

### Vasant says, "I have as many sisters as brothers'. Vaishali says, "Each of us sisters has only half as many sisters as brothers". Assuming that Vasant and Vaishali are brother and sister, how many brothers and sisters are there in the family? 8 brothers and 6 sisters 6 brothers and 5 sisters 5 brothers and 4 sisters 4 brothers and 3 sisters None of the above

centraos8yn 2023-02-05

### How to simplify ${\left(\mathrm{sin}X-\mathrm{cos}X\right)}^{2}$?

Marcus Frank 2023-02-05

### What is the result of converting 14 inches into centimeters?

Linda Norman 2023-02-05

### $37\frac{1}{2}\mathrm{%}$ is equal to what fraction?

emnehefteye4 2023-02-05

### What is 2000 divided 2 equal to?

Taniyah Hartman 2023-02-05

### Simplify $\mathrm{cot}x\left(\mathrm{sec}x+\mathrm{tan}x\right)$?

alemanica8h2 2023-02-05

### How to prove $\mathrm{sin}\left(x-\left(\frac{\pi }{2}\right)\right)=\mathrm{cos}x$?

Wendy Larsen 2023-02-05

### What is the sum of the arithmetic sequence 152, 138, 124 if there are 24 terms?

alemanica8h2 2023-02-05

### How to simplify the expression $\frac{{\mathrm{cos}}^{2}x}{1+\mathrm{sin}x}$?

bakouninetov 2023-02-05

### How to simplify $\mathrm{sin}\left(x\right)\mathrm{tan}\left(x\right)+\mathrm{cos}\left(x\right)$?

acainzar3t2 2023-02-05

### How many solutions would a quadratic equation have if the discriminant is 12?

Kiersten Edwards 2023-02-05