latihan trogonometry 2014

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In diagram 1, EFGH is a rectangle.

E

F

 x

0

   m    c    6 y◦

 J

2cm

H

Given that tan  x  = 1. Find (a) The length of EF . (b)

The value of cos  y .

G

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In Diagram 4, cos  x  =  =

.

13

 B

 x

y

C

D

If ACD i s a straight line and AC  =  = 5 cm, find the length of BD when sin y  =  =

1

.

2

Diagram 3 shows two right-angled triangles. Given cos  x



5 13

, find the length in cm of QR.

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