First Aid:
 

• Be certain your calculator is in degree mode.
• It may be necessary to reverse the sequence of keys pressed.
• The phrase 'angle between' expects the smallest positive angle between the two lines.  In the event slope is negative, change the numbers to be positive before solving.

Question 1

Determine the angle (in degrees) made between the x axis and the line  y = x + 3

 

45.0	50.0	71.6	79.5
79.5	90.0

First Aid:
 

• Be certain your calculator is in degree mode.
• It may be necessary to reverse the sequence of keys pressed.

The phrase 'angle between' expects the smallest positive angle between the two lines.  In the event slope is negative, change the numbers to be positive before solving.

Question 2

Determine the angle (in degrees) made between the x axis and the line  y = 2x - 3

 

45.0	63.4	70.5
71.6	79.5

.

• Be certain your calculator is in degree mode.
• It may be necessary to reverse the sequence of keys pressed.

The phrase 'angle between' expects the smallest positive angle between the two lines.  In the event slope is negative, change the numbers to be positive before solving.

Question 3

 

Determine the angle (in degrees) made between the x axis and the line  y = -3x + 5

 

-78.7	-71.6	71.6	78.7
79.5	87.4	not possible since the slope is negative

First Aid:
 

• Be certain your calculator is in degree mode.
• It may be necessary to reverse the sequence of keys pressed.

The phrase 'angle between' expects the smallest positive angle between the two lines.  In the event slope is negative, change the numbers to be positive before solving.

Question 4

Determine the angle (in degrees) made between the x axis and the line  x = 4

 

not possible	0.0	call a friend
76.0	84.4	90.0

• Be certain your calculator is in degree mode.
• It may be necessary to reverse the sequence of keys pressed.

The phrase 'angle between' expects the smallest positive angle between the two lines.  In the event slope is negative, change the numbers to be positive before solving.

Question 5

Determine the angle (in degrees) made between the x axis and the line  2x + 3y = 7

 
 

33.7	54.5	63.4
66.8	71.6	74.0

This topic introduces one of the basic trig ratios.

Whenever possible, remember to use the same calculator.  They all get the same answers, but not with the same keystrokes