In Exercises 81–86, use words to describe the formula for each of the following: 81. the cosine of the difference of two angles. 82. the cosine of the sum of two angles. 83. the sine of the sum of two angles. 84. the sine of the difference of two angles. 85. the tangent of the difference of two angles. 86. the tangent of the sum of two angles.

Q: Write JICA if the statement is true and TAWI-TAWI if the statement is false. 1. An oblique triangle…

A: You must have an idea about the basics of trigonometry in order to understand this sets of problems…

Q: 13. (a) State the Law of Cosines. (b) Find side a in the figure. 30 40° A B 50

A: 13.(a) Law of Cosines: c=a2+b2-2ab·cosθ where a, b, c are side lengths and θ is the angle opposite…

Q: Is it possible to have a right triangle where sin 0 = 2.5? Explain how you know 4 8. 3. !!!

A:

Q: 29. A telephone pole casts a 23-foot shadow along the ground when the angle of elevation of the Sun…

A: tan x = opposite/adjacent

Q: 22. The angle of elevation to the top of a building is found to be 50° from the ground at a distance…

A:

Q: Write the law of sines.

A:

Q: 10. Write three equivalent trigonometric expressions with angles between 0 and 2r to sin . Include a…

A:

Q: bisod srt 2i 161 woh d 4 km 5 km no dignol erit enim 6 km

A:

Q: Given the figure above, solve for the missing angle, x. Do not include units in your final answer;…

A: The given figure isFrom the figure,

Q: 3)You borrou two calculators from friends, but do not Know whether they are set to work in degrees…

A:

Q: 81. The original Ferris wheel, built in Chicago in 1893, completed 4 revolutions in 40 minutes. Find…

A: There are revolutions in Here we have to find the angular speed

Q: 74. Error Analysis Describe the error.cos 60° = opphyp = 12

A: Given: cos60°=oppositehypotenuse=12 To determine: The error in the given statement.