1 / 12

# Geometry B Bellwork - PowerPoint PPT Presentation

Geometry B Bellwork. 3) Using the inverse of tangent Find m N to the nearest degree. tan N = = m N = tan -1 (0.6) m N ≈ 31°. N. 18 30. 0.6. 30. R. X. 18. 9-2 Sine and Cosine Ratios. B c a C b A. sin A = opposite side

I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.

## PowerPoint Slideshow about ' Geometry B Bellwork' - niran

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.

- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
Geometry B Bellwork

3) Using the inverse of tangent

Find m N to the nearest degree.

tan N = =

m N = tan-1(0.6)

m N ≈ 31°

N

18

30

0.6

30

R

X

18

### 9-2 Sine and Cosine Ratios

c

a

C b A

sinA =opposite side

hypotenuse

sinA = a

c

c

a

C b A

hypotenuse

cosA = b

c

EX. Write the sine and cosine ratio for A and B.

sinA =

cosA =

sinB =

cos B =

17

8

C

A

15

EX 2. Find the value of w to the nearest tenth

cos=

5.1≈ w

CROSS MULTIPLY

w

6

32°

6

1

(6)cos 32°=w

32°

w

Ex 3 . Find the value of w to the nearest tenth

sin =

7.1 ≈ w

CROSS MULTIPLY

w

9

52°

w

1

(9)sin52°=w

9

52°

OYO….Find the value of w to the nearest tenth

sin =

8.6 ≈ w

CROSS MULTIPLY

w

12

46°

1

(12)sin46°=w

12

w

46°

EX 4. Find the value of w to the nearest tenth

cos=

w ≈ 10.7

CROSS MULTIPLY

62°

5

w

1

cos62°(w)= 5

w

cos62°

cos62°

5

62°

OYO. Find the value of w to the nearest tenth

sin =

w ≈10.3

CROSS MULTIPLY

43°

7

w

7

1

sin43°(w)= 7

w

sin43°

Sin 43°

43°

Find m X to the nearest degree.

cos X = =

m X = cos-1( )

m X ≈ 55°

N

8

14

0.571428571

14

0.571428571

R

X

8

Find m X to the nearest degree.

sin X = =

m X = sin-1( )

m X ≈ 43°

N

13

19

0.684210526

19

0.684210526

13

R

X