Mathematics B Exam Worksheet - Regents High School Examination, The University Of The State Of New York, 2005 Page 4

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10 A small fragment of something brittle, such as pottery, is called a shard.
Use this space for
The accompanying diagram represents the outline of a shard from a
computations.
small round plate that was found at an archaeological dig.
C
A
B
If
is a tangent to
at B and m∠ABC= 45, what is the measure
BC
AB
of
, the outside edge of the shard?
AB
(1) 45°
(3) 135°
(2) 90°
(4) 225°
11 Which graph is not a function?
y
y
3
3
x
x
–3
3
–3
3
–3
–3
( 1 )
( 3 )
y
y
3
3
x
x
–3
3
–3
3
–3
–3
( 2 )
( 4 )
5
12 If A is a positive acute angle and sin A =
, what is cos 2 A?
3
1
1
(1)
(3)
9
3
1
1
(2) –
(4) –
9
3
[4]
Math. B – Jan. ’05

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