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Flashcards in InstaTrig Deck (32)
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1

sin (-x)=

-sin x

2

cos (-x)=

cos x

3

tan (-x)=

-tan x

4

csc (-x)=

-csc x

5

sec (-x)=

sec x

6

cot (-x)=

-cot x

7

sin (a +/- b)

sin a X cos b +/- sin b X cos a

8

cos (a +/- b)

cos A X cos B +/- sin A X sin B

9

tan (a +/- b)

(tan a +/- tab b)/ (1 +/- tan A X tan B)

10

sin 2A

2 sin A cos A

11

cos 2A

(cos A)^2 - (sin a)^2 <> 2(cos A)^2 -1 <> 1- 2(sin A)^2

12

tan 2A

(2 tan A)/(1-(tan A)^2)

13

(sin A)^2

(1- cos 2A)/2

14

(cos A)^2

(1 + cos2A)/2

15

(tan A)^2

(1-cos2A)/(1+cos2A)

16

sin A + sin B

2sin((A+B)/2) X cos((A-B)/2)

17

sin A - sin B

2cos((A+B)/2) S sin ((A-B)/2)

18

cos A + cos B

2cos((A+B)/2) X cos((A-B)/2)

19

cos A - cos B

-2sin((A+B)/2) X sin((A-B)/2)

20

sin A X sin B

0.5 (cos (a-b) - cos (a+b))

21

cos A X cos B

0.5(cos (a-b) + cos (a+b))

22

sin A X cos B

0.5(sin (a+b) + sin (a-b))

23

cos A X sin B

0.5(sin (a+b) - sin (a-b))

24

(sin x)^2 + (cos x)^2=?

1

25

1 + (tan x)^2=

(sec x)^2

26

1+ (cot x)^2=

(csc x)^2

27

sin ((pi/2) - x)=

cos x

28

cos ((pi/2) -x)=

sin x

29

csc ((pi/2) -x)=

sec x

30

tain ((pi/2) -x)=

cot x

31

sec ((pi/2) -x)=

csc x

32

cot ((pi/2) -x)=

tan x