brkr19

a series of numbers in which each number ( Fibonacci number ) is the sum of the two preceding numbers. The simplest is the series 1, 1, 2, 3, 5, 8, etc.

it is also used in the golden ratio (when can be easily googled)

set up the proportion

6 yards= 18 feet= 216 inches

so

216        1

-----  =  -----

8.64       x

then you cross multiply to find x (8.64 * 1)/216 =0.04

so the price per inch is 4 cents per inch

I hope that helps

start by turning 1 into a fraction with the same denominator as 7/3

3/3 -7/3

to simplify make it 3-7 =-4

                                   3

so 1-7/3= -4/3

start by isolating the variable and adding 7 to both sides

8x-7=0

   +7  +7

8x=7 then divide by 8

8x =7

/8     /8

x=7/8

so in order to find 

arcsin

arctan

arccos 

(the inverse to your three main trig functions)

you have to remember SOH CAH TOA

sin=Opposite/hyptoenuse  so arcsin= hypotenuse/opposite

cos= adjacent/hypotenuse so arccos= hypatenuse/adjacent

tan= opposite/adjacent       so arctan= adjacent/opposte

(arcsin can be written sin^-1 as can the others)

inverse operations for functions? trigonometry? 

probably because, like most modern graphing calculators (excluding the TiNspire )

its difficult to code also

you can use the change of base formula in order to add custome values.

math is the application of numbers in order to understand the universe and all things unknown.

its also life.

in order to add or subtract fractions you first have to get a common denominator (the number on the bottom)

so 1/2 and 1/5 

the common denominator is 10 (2*5)

so we take 

1/2 and make it 5/10

and 1/5 becomes 2/10

so 5/10+2/10=7/10

so 1/2+1/5=7/10