A Trigonometric Path into the Land of Regular Pentagons - National ...

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Extension Worksheet: Finding the Missing Angle ANSWER KEY You can find the degree measure of a missing angle of a right triangle with the given ratio using the graphing calculator. Example: Sin ____ ≈ .5878 Directions: Step 1: Make sure mode is set to Degrees. Step 2: Push the 2 nd button. Step 3: Push the sin button. sin -1 (should appear on the screen.) Step 4: Type .5878 and close parenthesis. Step 5: Push enter. The answer is 36.00104446. Then round to the nearest degree. The final answer is 36º. Using your calculator find the degree, round to the nearest degree. 1. Sin 89º ≈ .9998 2. Cos 1º ≈ .9998 3. Tan 44º ≈ .9657 4. Tan 65º ≈ 2.1445 5. Cos 86º ≈ .0698 6. Sin 31º ≈ .5150 7. Tan 89º ≈ 57.290 8. Cos 45º ≈ .7071 Using your calculator find the missing angle degree, round to the nearest degree. 9. 17 25 xº sin = opp hyp 17 sin x = 25 sin x = .68 -1 o sin (.68) 43 =
10. mº 7 24 tan = opp adj 24 tan m = 7 tan m = 3.43 -1 o tan (3.43) 74 = 11. yº 30 sin = opp hyp 11 sin y = 30 sin y = .367 -1 o sin (.367) = 22 11 12. opp tan = 1 adj 1 tan t = 10 tan x = .1 = o -1 tan (.1) 6 10 tº
Page 1 and 2: A Trigonometric Path into the Land
Page 3 and 4: Embedded Assessment • The teacher
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Page 8 and 9: 14. Use the above steps to complete
Page 10 and 11: 10. Change the measure of your poin
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Page 14 and 15: Worksheet #2 - Extra Practice ANSWE
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Page 22 and 23: Example 2: Find x 16 x 81 ◦ Steps
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Page 26 and 27: Example 2: Find x 16 x 81 ◦ Steps
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Page 30 and 31: Worksheet #4: Practice Finding Miss
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Page 34 and 35: Worksheet #5: Trig Word Problems AN
Page 36 and 37: Worksheet #6 - Finding the Area of
Page 38 and 39: Worksheet #6 - Finding the Area of
Page 40 and 41: Worksheet #7 - Pentagon Practice Us
Page 42 and 43: 4. A regular pentagonal garden with
Page 44 and 45: Find the missing lengths. 9. 10. x
Page 46 and 47: Quiz - Trig Functions and Area of R
Page 48 and 49: Extended Constructed Response Direc

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