If you have a RIGHT triangle with a 29-degree angle in it, and you divide the length of the leg adjacent to the angle by the length of the hypotenuse, then it doesn't matter whether the triangle is drawn on the head of a pin or on a piece of paper that reaches from the Earth to the Moon, the quotient of (adjacent)/(hypotenuse) will always be the same number ... about 0.875 .
That number is a property of every 29-degree angle, no matter the size of the right triangle that it's in. It's called the cosine of 29 degrees.
If you were to divide the leg opposite the 29-degree angle (instead of the adjacent leg) by the length of the hypotenuse, you'd get a different number ... about 0.485 . That number is also a property of every 29-degree angle, no matter the size of the triangle around it. That one is called the sine of 29 degrees.
I just used 29 degrees as an example. Every angle has a sine and a cosine, and a few other things too.
If you have an angle, there's no easy way to calculate its sine or its cosine. You just have to look them up. They're in tables in books, or on line (just put 'cosine 29' in Google), and if you have a calculator, they're probably on your calculator too.
You don't know yet what these are good for, or what you can do with them. That'll be coming up in math before you know it !
So the easiest answer to your question is:
Every angle has properties, characteristics, and aspects of its personality that you never notice until you really get to know it. They're called the sine, the cosine, the tangent, the cotangent, the secant, and the cosecant. They're all numbers, and every angle has a full set of them !
Using sine and cosine, it's possible to describe any (x,y) point as an alternative, (r,θ) point, where r is the length of a segment from (0,0) to the point and θ is the angle between that segment and the x-axis. This is called the polar coordinate system, and the conversion rule is (x,y) = (rcos(θ),rsin(θ )).
Use the distributive property to write an equivalent expression for 8(y-7)
Answers
Answer:8y-56
Step-by-step explanation:8(y-7)= (8*y)+(8*(-7)) so 8y+(-56) or 8y-56
Answer:
The answer is
Step-by-step explanation:
there are 8 pencils in a package. how many packages will be needed for 28 children if each child gets 4 pencils
Answers
14 because 28x4=112 112 divided by 8=14 answer=14
A metal rod is placed in a rectangular box as shown in the figure. How long is the rod? Round your answer to the nearest tenth of an inch, if necessary. A. 5.0 in. B. 12.1 in. C. 13.4 in. D. 14.2 in.
Answers
fist we find the legnth of the diagonal a^2+b^2=c^2 3^2+4^2=c^2 9+16=c^2 25=c^2 c=5
now the other diagonal 11^2+5^2=c^2 121+25=c^2 146=c^2 sqrt both sides12.083 closest is B
Y=-3x+24x-15 in vertex form
Answers
Answer: (4,-38) i think
Y = a(x-h)^2+k First divide factor out -3 so Y = -3(x^2-8x+5) Then complete the square: Y = -3(x^2-8x+16+5-16) Y = -3(x-4)^2+33
Math help me))))))))please
Answers
x^2/(x- 9 = 81/(x - 9) This is the equation for which you want the solution. Multiplying both sides of the equation by (x - 9) we get x^2(x - 9)/(x - 9) = 81(x - 9)/(x - 9) So the (x - 9) goes out from both the denominator and the numerator and then the simplified equation becomes x^2 = 81 x ^2 = (9)^2 x = 9 So the value of the unknown variable x comes out to be 9.
Multiply each side of the equation by (x - 9) . Then the equation says: x² = 81 .