Review Sum and Difference, Double Angle Formulas Flashcards

1

cos(2x)

sin2x-cos2x
sin x - cos x
cos x - sin x
cos2x-sin2x

2

tan (2x)

cos2x - sin2x
(2tanx) / (1 - tan2x)
1 - tan2x
(1+2tanx) / (tan2x)

3

sin(50)cos(10) - cos(50)sin(10)

cos(60)
cos(40)
sin(40)
sin(60)

4

cos (A - B)

cos(A)sin(B)-sin(A)cos(B)
cos(A)cos(B)+sin(A)sin(B)
cos(A)sin(B)+sin(A)cos(B)
cos(A)cos(B)-sin(A)sin(B)

5

cos(80)cos(10) - sin(80)sin(10)

sin(90)
cos(90)
cos(70)
sin(70)

6

cos(60) cos(45) + sin(60) sin(45)

cos (105)
sin(15)
cos (15)
sin(105)

7

Which of the following is equivalent to......

1
tan(x)
Yes
90

8

1+ cot²θ

sec2θ
tan2θ
csc2θ
cos2θ

9

sin(A - B)

cosAcosB-sinAsinB
sinAsinB-cosAcosB
sinAcosB-cosAsinB
sinAcosB+cosAsinB

10

sec (x)

1/cot (x)
1/ cos(x)
1/sin(x)
csc (x)

11

csc(x)

1 / tan x
1 / cos x
sin( 90 - x)
1 / sin x

12

tan (90 - θ)

sin θ
tan θ
cot θ
cot (90 - θ)

13

sec(x)

csc(x)
1-sin(x)
1/sin(x)
1/cos(x)

14

sin (x + π)

sin x
- cos x
-sin x
0

15

sin (A + B)

sin(A)cos(B) - cos(A)sin(B)
sin(A)sin(B)+ cos(A)cos(B)
sin(A)cos(B)+ cos(A)sin(B)
sin(A)sin(B) - cos(A)cos(B)

16

sin ( π/2 - x)

sin (π/2)
cos (π/2)
sin x
cos x

17

sin(-x)

sin(x)
-sin(x)
cos(x)
cos(-x)

18

cos( π/2 - x)

sin (π/2)
cos x
cos (π/2)
sin x

19

cos(-x)

sin(x)
- cos(x)
cos(x)
- sin(x)

20

sin(2x)

2sin(x)
sin(x)-cos(x)
cos^2(x)+sin^2(x)
2sin(x)cos(x)

Review Sum and Difference, Double Angle Formulas

Questions 20

Review Sum and Difference, Double Angle Formulas

Questions 20