1.3.3 Trigonometrical Ratios

Question 1

SOHCAHTOA can be used for angles 0-90, what do we use for 0-360?

Answer 1

Quadrants

Question 2

The first quadrant is what values?

Answer 2

0-90

Question 3

In the first quadrant all trigonometrical ratios are what and why?

Answer 3

Positive because they are in the positive x and y axis.

Question 4

What are second quadrant values?

Answer 4

90-180 but still starting from 0 as in the first quadrant.

Question 5

Sin cos and tan in the first quadrant are = to?

Answer 5

Sin cos and tan as normal.

Question 6

Sin cos and tan in the second quadrant are = to?

Answer 6

Sin (180° - angle)
-cos (180° - angle)
-tan (180° - angle)

Question 7

Sin cos and tan in the third quadrant are = to?

Answer 7

-sin (angle- 180°)
-cos (angle- 180°)
tan (angle- 180°)

Question 8

Sin cos and tan in the fourth quadrant are = to?

Answer 8

-sin (360°- angle)
cos (360°- angle)
-tan (360°- angle)

Question 9

In second quadrant which value is positive?

Answer 9

Sin

Question 10

In third quadrant which value is positive?

Answer 10

Tan

Question 11

In fourth quadrant which value is positive?

Answer 11

Cos