Angles of Elevation Angles of Depression More Trigonometry ... ... it's all about the angles and how you look at them ... Looking Down, Part I Beeches sunrise 3
Angles of Elevation
Angles of DepressionMore Trigonometry ...
... it's all about the angles and how you look at them ...
Looking Down, Part I
Beeches sunrise 3
1089
(1) You just bought 40 L of gas. If you get a discount of 3.5¢/L, how much money will you save?
$1.40
(2) What is the cost of one CD if 4 cost $82.00? $20.50
(3) What is the cost of one if 2 T-shirts cost $35.00? $17.50
(4) How much white sugar is used to make 9 muffins?
1/4 cup
(5) How much butter is needed to make 45 muffins?
1 1/4 cups
(6) Find 75% of 124 93
(7) Find 75% of 110 82.5
(8) Name one LABEL in the spreadsheet.
Name, Hourly Wage, Hours, or Earnings
(9) Write a spreadsheet formula that would calculate the average earnings of all 4 people.
=AVERAGE(D2..D5)
(10) What is 99 x 11?
The following ingredients are used to make 18 banana muffins:6 small, ripe bananas 1 cup brown sugar1/2 cup white sugar 2 eggs 1/2 cup butter 3 cups flour2 tsp. baking soda 2 tsp. baking powder 1 cup chocolate chips 1 tsp. salt
Name Hourly Wage Hours Earnings Abbie 7 4 Barry 8 5 Cindy 9 6 David 10 7
A B C D12345
Mental Math
Determine each of the following ratios:
e) cos ∠A = f) tan ∠A =
c) tan ∠B = d) sin ∠A =
a) sin ∠B = b) cos ∠B =
Use your calculator to determine the value of the following trig ratios rounded to four decimal places.
e) cos 45° = f) tan 45° =
c) tan 70° = d) sin 60° =
a) sin 45° = b) cos 60° =
In a right triangle, the leg adjacent to the angle of 25° is 12 cm long.
d) How long is the hypotenuse of the triangle?
c) How long is the side opposite the 25° angle to the nearest tenth of a centimetre?
b) What are the measures of the other angles?
a) Draw a diagram of the triangle indicating the given angle and side.
A 4 m ladder leaning against a house makes a 65° angle with the ground. How high up the wall of the house does the ladder reach?
A 15 m ramp is built to the loft door of the barn. The loft door is 5 m above ground level. Find the angle that the ramp makes with the ground (angle of elevation).
Skiers ski down a slope that is inclined at a 35° angle to the horizontal. If the skiers reach ground level after travelling a distance of 1280 m, how high is the slope where they began their run?