Download right triangle trig

Primetime
1. A student uses a hot plate, a thermometer, and a
stopwatch to investigate the rate at which a metal object
conducts heat. To ensure the most reliable results, which of
the following should the student do?
A Perform a second investigation using different
tools
B Use several thermometers to measure
temperature
C Develop a hypothesis before starting the
investigation
D Repeat the entire investigation several times
Webquest Assignment
Go to google
Do a search for “Save Our Gravity
webquest”
This should be the first result and should
say something about Gravitron the evil
warlord.
You may work with a partner to complete
the webquest.
When the fuse ignites the contents of a
firework, oxygen is consumed as a result of
which type of change?
A Mass
B Phase
C Nuclear
D Chemical
A student compares the viscosities of two solutions at room temperature.
The student uses a metal block and equal volumes of the two solutions in
identical containers. Which procedure would provide the best comparison
of the viscosities of the solutions?
A Determining whether the block raises or lowers
the density of either solution
B Determining whether the block raises or lowers
the temperature of either solution
C Measuring the volume of liquid the block
displaces in each solution
D Measuring the time it takes the block to sink in
each solution
The elements in which of these sets have
chemical properties that are the most similar?
A) K, Ca, Sc
B) O, S, Se
C) Na, Ca, Y
D) P, S, Cl
Trigonometry is the study and solution of
Triangles. Solving a triangle means finding
the value of each of its sides and angles. The
following terminology and tactics will be
important in the solving of triangles.
Right  Trigonometry
The three trig ratios:
sine – sin cosine – cos
tangent – tan
4.3 Right  Trigonometry
opposite
sin  
hypotenuse
4.3 Right  Trigonometry
adjacent
cos  
hypotenuse
4.3 Right  Trigonometry
opposite
tan  
adjacent
Ex 2: Sketch a triangle that
has an acute angle , and
find the other two trig ratios
of . Then find .
5
sin  
8
Ex 1: Solve for x.
x
25˚
5
Ex 3: Solve for x & y.
x
y
30˚
5
Ex 4: Solve for x & y.
x
8
45˚
y
4.3 Right  Trigonometry
Solve a Triangle: Find the
measure of all its parts.
Line of Sight:
Horizontal Leg
4.3 Right  Trigonometry
Angle of Depression =
Below Line of Sight
Angle of Elevation =
Above Line of Sight
Solving
If unknown is on top of your fraction in the
trig function, multiply the number on
bottom by your trig function
If unknown is on bottom of your fraction in
the trig function, divide the number on top
by your trig function
Ex 6: An airplane is flying at an
elevation of 5150 ft, directly
above a straight highway. Two
motorists are driving cars on the
highway on opposite sides of the
plane, and the angle of
depression to one car is 35 and
to the other is 52. How far apart
are the cars?
Ex 1: Find the value of the
three trig ratios of A.
A
7
B
4