8
(b) AP,
0.
(c) the chord BP.
Figure 3
Figure 3 shows a circle BPC with centre O.
The point A is such that AC = 9 cm and AC and AB are tangents to the circle.
APO is a straight line and ZOAC = 23°
Calculate the length, in cm to 3 significant figures, of
(a) OA,
(d) Calculate the size, in degrees, of ZACP.
Sine rule:
P
(e) Find the area, in cm² to 3 significant figures, of the shaded region BAP.
a
sin A
Cosine rule: a² = b² + c² − 2bc cos A
b
sin B
Area of a triangle
9 cm
=
=
23°
C
sin C
besi
2
-bc sin A