In âPQR. ∠PQR is a right angle. |QR| = 2cm and ∠PRQ = 60o. Find |PR|
Attached Figure / Diagram
A
4â3cm
B
4cm
C
2â3cm
D
\(\frac{4}{3}cm\)
E
1cm
Verified Correct Answer: B.
Step-by-Step Mathematical Solution
cos60 = \(\frac{adj}{hyp}\)
cos60 = \(\frac{2}{x}\)
x = \(\frac{2}{cs60}\) = 2 x \(\frac{2}{1}\) = 4cm
Source: Myschool Past Questions Archive (Record #26348)