In a class, there are 24 boys and 36 girls. The number of boys is one of the girls and the number of girls is one of the whole class

In a class, there are 24 boys and 36 girls. The number of boys is one of the girls and the number of girls is one of the whole class

In a class, there are 24 boys and 36 girls. The number of boys is 2 / 3 of that of girls, and the number of girls is 3 / 5 of that of the whole class
Do not understand can ask, help please adopt, thank you!
Find the square of (sin20) + the square of (cos50) + the value of sin20cos50
(sin20) ^ 2 + (cos50) ^ 2 + sin20cos50 = (sin20) ^ 2 + (sin40) ^ 2 + sin20sin40 = (sin20 + sin40) ^ 2-sin20sin40 according to the sum difference product, product and difference formula: sin20 + sin40 = 2Sin [(20 + 40) / 2] cos [(40-20) / 2] = cos10 - sin20sin40 = [cos (20 + 40)] / 2 - [cos (4
There are 24 boys and 36 girls in class 61. What is the ratio of boys to girls
The problem is that if boys are more than girls, the number of boys should be written in the front: boys are 24, girls are 36, that is 24:36, simplified to 2:3
Given the vector a = (1,2), the vector b = (- 2, n), the angle between a and B is 45 degrees
(1) If C and B are in the same direction, and a is perpendicular to C-A, then C. I don't understand. And I feel that your solution is wrong!
(1) (a) a \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\b (- 2,6) (2) C (x, y)
There are 50 students in class 61, including 24 girls and 26 boys?
The number of girls is twice that of boys
=24÷26×100%
=92.3%
24÷26≈92.3%
24÷26≈92.31%
24÷26=92，3
24/26X100%=92.3%
If we know two points a (cos40 ° sin40 ° and B (cos20 ° sin20 '), how much is vector a multiplied by vector B
Vector a * vector b = cos40 ° cos20 ° + sin40 ° sin20 ° = sin (40 ° + 20 °) = sin60 = root 3 / 2
p. Think of the induction formula
Wait, what's this!
Let me do the calculation for you
It's cos20 ° HMM
There are 36 boys in class 5 (3), 24 more than girls. What percentage of the class are boys
three-fourths
Given a = (cos40, sin40), B = (sin20, cos20), then the value of a × B is
It's cos 40, sin 40, sin 20, cos 20
a×b=cos40×sin20+sin40cos20
=sin(20+40)=sin60=√3/2
There are 26 boys and 20 girls in class five (1). How many times is the number of boys more than that of girls? What is the proportion of girls to boys?
A: the number of boys is 1310 times that of girls, and the number of girls is 1013 times that of boys
Let the vector a = (cos25 ° sin25 ° and B = (cos25 ° sin155 '), then the vector a * and B =?
Vector a = (cos25 ° sin25 °), vector b = (cos25 ° sin155 °),
Then vector a * vector b = cos25 ° cos25 ° + sin25 ° sin155 °
=(cos25°)^2+sin25°sin(180°-25°)
=(cos25°)^2+(sin25°)^2
=1.
One
Hope to adopt