In the diagram above, ∠PRQ = 90°, ∠QPR = 30° and /PQ/ = 10 cm. Find y.

Chuks612

9 years ago

Wrong.. Using sine rule this will be equal to 6.

ateshie

10 years ago

Here is an explanation:

sin90/12 = sin30/y (sine rule) y=12sin30/sin90 y=12*0.5/1 y=6cm

ItzBIM

6 years ago

This question seems to be controversial.
1. It is stated in the question that PQ is 10cm.
2. In the diagram, PQ is 12cm
3. If we use Pythagoras and make PQ 12cm or 10cm, we get 10.91cm and 8.66cm respectively which is not part of the options.
if we use SOHCAHTOA, we get 6 or 5 cm if we consider PQ hypotenuse and 2.89 if we consider PR.

Godconquer

5 years ago

The answer is 6 myshool please check your calculations.

Eno_the_great_sage

1 year ago

The diagram says 12cm but the question says 10cm