Answer:
60 girls play sports
Step-by-step explanation:
#1- divide 105 by 7=15
#2- multiply 4 by 5= 60
therefore 60 of the 105 girls play sports
Answer:
Wrong Numerator Denominator
Step-by-step explanation:
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the value of cos 15 is √3+1/2√2
explanation
cos (45-30)
=cos45*cos30+sin45*sin30
=1/√2 * √3/2 + 1/√2 * 1/2
=√6/4 + √2/4
=√6 + √2/4
=√3+1/2√2
Answer: 
Step-by-step explanation:
Given
The hypotenuse is 13 units
One of the lengths is 12 units
The marked angle is x
from the figure, we can write
![\Rightarrow \cos x=\dfrac{12}{13}\\\\\Rightarrow x=\cos^{-1}[\dfrac{12}{13}]\\\\\Rightarrow x=22.62^{\circ}](https://tex.z-dn.net/?f=%5CRightarrow%20%5Ccos%20x%3D%5Cdfrac%7B12%7D%7B13%7D%5C%5C%5C%5C%5CRightarrow%20x%3D%5Ccos%5E%7B-1%7D%5B%5Cdfrac%7B12%7D%7B13%7D%5D%5C%5C%5C%5C%5CRightarrow%20x%3D22.62%5E%7B%5Ccirc%7D)