Page 189 - Mathematics_Form_Two

Trigonometry

2. If y is an acute angle, use a calculator (e)
to find the value of y in each of the
following:
(a) cos y = 0.2034 (d) sin y = 0.8952

FOR ONLINE READING ONLY
(b) sin y = 0.5975 (e) cos y = 2
5
1
(c) tan y = 1.5000 (f) tan y =
3
3. Find the values of x and y in each (f) Mathematics for Secondary Schools
of the following, giving your answer
correct to 1 decimal place.

(a)
12 cm y (g)

40 0
x

(b)
3.1 cm y (h)

56º
x

(c)

y 1 m
4. In each of the following triangles, find
60 0 the values of the unknown letters:
x
(a)
(d)
10 cm y

25º
34º
x

183
Student's Book Form Two

11/10/2024 20:14:12
MATHEMATIC F2 v5.indd 183 11/10/2024 20:14:12
MATHEMATIC F2 v5.indd 183