Week 3 Flashcards
1
Q
A
2
Q
A
3
Q
A
4
Q
3x+ 5x
A
3x+ 5x= 8x
5
Q
9x2−2x2
A
9x2−2x2 = 7x2
6
Q
2x+ 4x+ 5y
A
2x+ 4x+ 5y = 6x+ 5y
7
Q
6x2−5x2+ 9x
A
6x2−5x2+ 9x = x2 + 9x
(Note that x2 and 9x are unlike terms)
8
Q
5x2−4x+ 8
A
The expression 5x2−4x+ 8 cannot be simplified further
9
Q
9x−5y+ 3x+ 4y
A
9x−5y+ 3x+ 4y
= 9x+ 3x−5y+ 4y
= 12x−y
10
Q
sin(2π−θ)
A
sin(2π−θ)
= −sin(θ)
11
Q
tan(180◦+x)
A
tan(180◦+x)
= tan(x)
12
Q
cos(−a)
A
cos(−a) = cos(a)
13
Q
tan(180◦−a)
A
tan(180◦−a)
= −tan(a)
14
Q
cos(π−θ)
A
cos(π−θ)
= −cos(θ)
15
Q
sin(π−x)
A
sin(π−x)
= sin(x)
