Explanation

The cosine function is defined for every real value of θ.

Therefore, its domain is all real numbers.

Last verified on 04-09-2026

Explanation

If students are arranged in a square, then:

Total students = side x side = side^2

So, number of students in each row = sqrt(Total students)

Total = 1156

sqrt(1156) = 34

Check: 34 x 34 = 1156

So in a square arrangement, each row has 34 students.

Last verified on 20-08-2026

Explanation

For a square:  

Area = side × side  

Side = 120 feet  

Area = 120 × 120 = 14400 square feet  

Last verified on 24-08-2026

Explanation

• The formula for the perimeter of a rectangle is 2(length + width).
• A rectangle has two equal lengths and two equal widths.
• Therefore, perimeter = length + width + length + width.
• Simplified formula: P = 2(l + w).

Last verified on 14-08-2026

Explanation

Area of circle = πr²  

Circumference = 2πr

Given: Area = 275 m²

1. Find radius r:

πr² = 275

r² = 275 / π = 275 / 3.1416 ≈ 87.54

r = √87.54 ≈ 9.356 m

2. Find circumference:

C = 2πr = 2 × 3.1416 × 9.356 ≈ 58.78 m

Last verified on 05-08-2026