Everything Maths Grade 10

30 60 90120150180210240270300330360

 3

 2

 1

1

y= 2 sin 1

x

y

17.For which values ofis the function positive, in the interval shown?

30 60 90120150180210240270300330360

 1

1

2

3

y= 2 cos+ 1

x

y

18.Given the following graph.

90 180 270 360

1

2

3

4

f(x)

g(x)

D

A C

B

x

y

a)State the coordinates atA; B; CandD.

b)How many times in this interval doesf(x)intersectg(x).

c)What is the amplitude off(x).

d)Evaluate:f(360◦)g(360◦).

19.Given the following graph.

206 6.6. Trigonometric functions