Tonight’s Homework

• Memorize all Trig stuff!!Pg. 367 #9 – 24 all

6.6 Applying Trig Functions

Applications• The terminal side of Ɵ is in

QI and lies on the line y = 1.5x. Find all trig function values of Ɵ and the measures of Ɵ and Ɵ’.

• Determine the angle between the x – axis and the line y = -3x + 4.

6.6 Applying Trig Functions

Definitions• The angle between the x –

axis in the positive direction and a line is called the angle of inclinations of the line.

• The terms angle of elevation or angle of depression are used to describe the angle between the line of sight and the horizontal.

6.6 Applying Trig Functions

More Applications! • The angle of elevation of

the top of a building from a point 100 ft away from the building on level ground is 65°. Find the height, h, of the building.– Draw a picture– Label knowns– Determine unknown– Solve the triangle

• From the top of a 100-ft building, a man observes a car moving toward him. If the angle of depression of the car changes from 22° to 46° during the period of observation, how far does the car travel?