I/D #3 unit Q

Where does sin2x+cos2x=1 come from to begin with (think Unit Circle!). You should be referring to Unit Circle ratios and the Pythagorean Theorem in your explanation.

An identity is any proven facts and formulas tht are always true. We have the unit circle in which we have our magic 5  pair. We get sin2x +cos2x =1. If we get any value on the unit circle like radical 3/2,1/2.if we do the math we end up getting the overall answer to equal 1



Inquiry reflection activity.


If I had to describe trigonometry in THREE words, they would be…

Wpp#13/14 unit p

This WPP13-14 was made in collaboration with  Damian Gomez and William de leon.  Please visit the other awesome posts on their blog by going    To damiangperiod5.blogspot.com And willaimdleonperiod5.blogspot.com

BQ #1 Unit P

Law of Sines - Why is SSA ambiguous?
 
The ambiguous case occurs when one uses the law of sines to determine missing measures of a triangle when given two sides and an angle opposite one of those angles. In some cases we have zero,one or two solutions. I such cases we assume that there are two possible triangles and we know we are done when we hit a wall. 

The above picture is an example of a one possible solution triangle. As we can see that it gives us two sides and one angle. We first start by finding the missing angles. We use the law of sine to find the "bridge" to the other triangle. Its usually the the same side and angle.


Area formulas - How is the “area of an oblique” triangle derived?  How does it relate to the area formula that you are familiar with?

The area of an oblique triangle is derived by having two side and one angle. 


REFERENCE


http://www.gradeamathhelp.com/law-of-sines.html

WPP #12 Unit 0 concept 10

Wall jump

A)  A man wants to jump a wall from the ground. The angle of elevation is 25 degrees 21 minutes. If the base of the wall is 32 feet away from the man, how tall is the wall?

B) The same man now stands atop the wall. He measures the angle of depression to be 26 degrees 2 minutes from a hole in the ground. He knows that he is 27 feet higher than the base. How long is the hole?

                                    A

B

I/D1: Unit O - Derive the SRTS

1.Inquiry Activity Summary

For this activity we are asked to find how to the srt of special right triangles. We see that we are given that the side us equal to 1.We are able to get the values that is the formula. We see that the variable n is in a relationship with all sides that have a connection together.





O
We have an equilateral triangle whose sides equal 1. For us to get the sides ,we have to cut the triangle in half . It gives us a 30,60,90 triangle. We see what we have and notice right away that one side of the triangle is split in one half . So we have two 1/2's and a 1 side We can use the Pythagorean theorem to help gwt the other values.




Inquiry Activity Reflection

Something I never noticed before about special right triangles I that the triangle value works for any triangle that has limited information.

I/D1: Unit N - How do SRT and UC relate?

INQUIRY ACTIVITY SUMMARY







* 30 degree  triangle description







A 30 degree angle is close to the x axis and it is closer to zero on a coordinate plane.the 30 degree triangle has a the same coordinate as as 60 degree triangle.The 30-60-90 triangle is the only right triangle whose angles are in an arithmetic progression. A 45 degree angle is half of a right angle and is on the middle of the first quadrant.We have a 30 degree triangle that its special rules are 2x,x radical 3, and x. in the directions we are told that r is equal to 1. Therefore we are left with 2x,x radical 3, and x. In order for us to have R (hypotenuse)equal to 1 we have to divide by 2x to all sides.The r side is 1 then x radical 3 divided by 2x is radical 3 over 2.The last side is x divided by 2x is 1/2. I was able to get the 30 degree angle coordinates for the unit circle.This lies in the 1 quadrant.

*60 degree triangle description


 
 A 60 degree angle is close to the x axis.We have a 60 degree triangle that its special rules are 2x,x radical 3, and x. in the directions we are told that r is equal to 1. Therefore we are left with 2x,x radical 3, and x. In order for us to have R (hypotenuse)equal to 1 we have to divide by 2x to all sides.The r side is 1 then x radical 3 divided by 2x is radical 3 over 2.The last side is x divided by 2x is 1/2. I was able to get the 60 degree angle coordinates for the unit circle.This lies in the 1 quadrant.





* 45 degree  triangle description

This is a 45-45-90 triangle whose special rules are 2x,x radical 2 ,x radical 2. We are given that r is equal to 1. We divide everything by 2x. We get 1, radical 2 over 2 ,radical 2 over 2.

 INQUIRY ACTIVITY REFLECTION
1. The coolest thing I learned from this activity was… that every coordinate is located on the unit circle. I never knew that we can use this to get a value of a given point.

 2. “This activity will help me in this unit because i need to learn the unit circle by memory and i need to be able to do it quick. I also need to know this to do well on the test and be able to pass the test. 

3.Something I never realized before about special right triangles and the unit circle is they are identical and they are the ones that are all over the circle.I see that it is the same for all other quadrants.

RWA #1 Unit M

1.Mathematical definition PARABOLA-the set of all points the equidistant from a point called the focus and a line called the directrix.(Mrs. Kirch) 2.Mathematical equation-(x-h)^2=4p(y-k) and (y-k)^2=4p(x-h) Graphically x-h The directrix is the line that crosses the vertex.the focus located on the directrix line. 3. This picture shows how parabolas are are used in real life.they are mathematically calculated to be kept standing and to support a roof. Its interesting how a simple shape can cause the building to stand. Parabolas are seen in buildings and bridges. It requires equations that help the engineer built a stable building or bridge. For bridges it must be calculated to be strong enough to hold cars. 4.www.chelsfield.com/project/the-parabola/ www.mathwarehouse.com/geometry/parabola/real-world-application.php