Answer:
Sin, Cos, Tan and others are used to calculate the ratios of the sides of a right angled triangle by taking a certain angle as the angle of reference.
On the other hand, Sin‐¹, Cos‐¹ and Tan-¹ are used to find the reference angle used to calculate the ratio of sides.
For this question,
we need to find which option should used to calculate the angle the slide makes with the vertical support.
So the option will have to be either A, C or E.
here, the base is 2.81m and hypotenuse is 3.64m.
we know, Cos = base / hypotenuse
So the angle is given by Cos-¹(2.81/3.64)
Option C
Answer:
The correct option is;
B. a. Whole number b. Irrational number
Step-by-step explanation:
The height, h of the equilateral triangle = 3·√2·s
The item by which equilateral triangle is made = 2-inch toothpicks
Therefore, we have;
The sides of the equilateral triangle = Comprises multiples of 2 inches
Therefore, the sides of the equilateral triangle is a whole number
The height of the triangle is the product of the side and (√3)/2
Therefore, the height of the triangle is an irrational number
The correct option is A. a. Whole number b. Irrational number.
A whole number are the positive counting numbers, 0, 1, 2, ..., while an integer includes negative numbers which is not possible for a real triangle.
Answer:
x = 1
y = -3
Step-by-step explanation:
cos(pi) = -1
so many ways :
sqrt(0.5/2) = sqrt(0.5/2 × 8/8) = sqrt(4/16)
= sqrt(0.5/2 × 18/18) = sqrt(9/36)
= sqrt(1/4) = 1/2
"nicest" approach (all integers) :
3x² = sqrt(9)
3x² = 3
x² = 3/3 = 1
x = 1
2y = sqrt(36)
2y = 6
y = 6/2 = 3
one of them has to be negative (because cos(pi) = -1), so it has to be y, because 3x² cannot be negative with real numbers.
so, y = -3
-1 × 3×1²/(2×-3) = sqrt(0.5/2) = 1/2
-1 × 3/-6 = 1/2
3/6 = 1/2
1/2 = 1/2
correct
Answer:
First of all, you'd divide 1800 by 2, which equals 900; then you divide 900 by 2, which is 450. Add those teo together and you'd get 1350, which is the answer.
Please let me know if this is wrong and I'll check it over
Answer:
I think the answer is 18 hope it helps
Step-by-step explanation:
