Trigonometry

Question 1

How to change from degrees to radians

Answer 1

Multiply by pi and divide by 180

Question 2

How to go from radians to degrees

Answer 2

Multiply by 180 and divide by pi (basically just remove the pi sign and multiply by 180)

Question 3

What happens if there is a trig squared term

Answer 3

If there is a trig squared term it is the you take it to the other side and take the square root

Question 4

What should we do when there is a radian which is not an exact value

Answer 4

Radians which are not exact values should be calculated using the calculator on radian mode

Question 5

When adding radian fractions what must be the same

Answer 5

Common denominator when adding radian fractions

Question 6

Period

Answer 6

Length of one cycle of the repeated wave

Question 7

Amplitude

Answer 7

The distance from the middle of the graph to the top/bottom

Question 8

What are the two methods for solving trig equations

Answer 8

Method 1 - send everything right and solve
Method 2 - substitute correct double angle formula and factorise

Question 9

If calculator gives maths error

Answer 9

There are no solutions

Question 10

Quadratic trig equations

Answer 10

Spot quadratic
Set to zero
Factorise

Question 11

What is the formula for gradient

Answer 11

Vertical / horizontal