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Geometry B Bellwork

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

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Geometry B Bellwork

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  1. 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

  2. 9-2 Sine and Cosine Ratios

  3. B c a C b A sinA =opposite side hypotenuse sinA = a c

  4. B c a C b A cosA =adjacent side hypotenuse cosA = b c

  5. B EX. Write the sine and cosine ratio for A and B. sinA = cosA = sinB = cos B = 17 8 C A 15

  6. Before starting this problem change your calculator mode to degrees 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

  7. Before starting this problem change your calculator mode to degrees 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°

  8. Before starting this problem change your calculator mode to degrees 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°

  9. Before starting this problem change your calculator mode to degrees 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°

  10. Before starting this problem change your calculator mode to degrees 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°

  11. EX. 5 Using the inverse of tangent 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

  12. OYO….Using the inverse of tangent 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

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