Download presentation

1
**Determining signs of Trig Functions (Pos/Neg)**

Last class we found trig values using an x-y coordinate. Not all trig values are positive x- x+ y+ y y+ We can determine the signs of trig values based on the quadrant that the terminal side of the angle falls in x x- x+ The signs of the x and y coordinates factor into the signs of the trig values y- y-

2
**Finding Trig Values from an x-y coordinate **

Find the 6 trig functions for an angle which has terminal side passing through (-3, 4) and give them the proper signs y This comes from the y coordinate which is positive x

3
**Finding Trig Values from an x-y coordinate **

Find the 6 trig functions for an angle which has terminal side passing through (-3, 4) and give them the proper signs y The hypotenuse is always positive So we have positive over positive meaning the sine is positive in the 2nd quadrant x

4
**Finding Trig Values from an x-y coordinate **

Find the 6 trig functions for an angle which has terminal side passing through (-3, 4) and give them the proper signs y This is comes from the x-coordinate which is negative x

5
**Finding Trig Values from an x-y coordinate **

Find the 6 trig functions for an angle which has terminal side passing through (-3, 4) and give them the proper signs y Hypotenuse – always positive Negative over positive making cosine negative in the 2nd quadrant x

6
**Finding Trig Values from an x-y coordinate **

Find the 6 trig functions for an angle which has terminal side passing through (-3, 4) and give them the proper signs y y-coordinate - positive x-coordinate - negative x positive over negative means tan is negative in the 2nd quadrant

7
**Finding Trig Values from an x-y coordinate **

Find the 6 trig functions for an angle which has terminal side passing through (-3, 4) and give them the proper signs y csc has the same sign as sin, sec is the same as cos, cot is the same as tan x

8
**Determining signs of Trig Functions (Pos/Neg)**

Add this into the original chart we started with y sin+ x- sin+ x+ cos+ cos- y+ y+ tan+ tan- csc+ csc+ sec+ sec- cot+ cot- x x- sin- x+ sin- cos- cos+ y- y- tan+ tan- csc- csc- sec- sec+ cot+ cot-

9
**Finding Trig Values from an x-y coordinate **

Find the 6 trig functions for an angle which has terminal side passing through (2, -7) and give them the proper signs y x

10
**Finding Trig Values from an x-y coordinate **

Find the 6 trig functions for an angle which has terminal side passing through (-5, 3) and give them the proper signs y x

11
Homework – pg 697 #9, 13, 14, 17, 20

Similar presentations

OK

7.3 Trigonometric Functions of Angles. Angle in Standard Position Distance r from ( x, y ) to origin always (+) r ( x, y ) x y y x.

7.3 Trigonometric Functions of Angles. Angle in Standard Position Distance r from ( x, y ) to origin always (+) r ( x, y ) x y y x.

© 2018 SlidePlayer.com Inc.

All rights reserved.

Ads by Google

Ppt on blind faith Ppt on 5g wireless system Ppt on mpeg audio compression and decompression Ppt on summary writing examples Free download ppt on the road not taken Ppt on motivation for employees Ppt on high court chandigarh Ppt on advanced energy conversion systems Ppt on building management system Ppt on bluetooth communication systems