Exact Values of Sin and Cos

Exact Values of Sin GCSE Mathematics

and Cos

FG19 HG19 1.

Prove that the value of Sin 30˚ = 1 2

2.

Find the value of

3.

Find the value of x in the following triangle:

given that Sin

= Cos .

8.5cm x

30°

4. Find the perimeter of the triangle ABC. Give your answer in the form a+b c A

B 60°

10m

C

Exact Values of Sin GCSE Mathematics

and Cos

FG19 HG19 Higher tier only

5.

A skating ramp has angle of 30° to the horizontal. Find the length of the ramp leaving your answer in the form a√b.

30° 3m

Higher tier only

6.

Knowing that the area of the triangle is 48cm2, find the length of x.

12cm

30° x