18. Use a calculator to evaluate the expression to the nearest tenth of a degree. cos-(0.8352) a. 36.8 b. 33.4° c. 37.9 d. 34.6 e. 35.7° 19. Use a calculator to evaluate each expression to the nearest tenth of a degree. sin-(-0.6271) a. -42.2° b.-43.3° - 40.0 d.-41.1 e.-38.8 y = cos-x. 20. Use your graphing calculator to graph command to evaluate the expression. in degree mode. Use the graph with the appropriate cos a. 140 b. 30° c. 45 d. 150° e. 120°

Q: Evaluate tan (315°) + sin (150°) =

A: To find:- tan315°+sin150°

Q: Use a calculator to give the value to the nearest degree. e = cos-1(-0.9397) %3D O-20° O 157° O 162°…

A:

Q: Use a calculator to evaluate each expression to the nearest tenth of a degree. sin-(-0.6271) -42.2°…

A:

Q: Find the measure of cos-1 (-0.5) in degrees and radians.

A: cos-1-0.5

Q: 3. Evaluate without calculator a. cos 120 degree. b. sec (pi/3) c. cot ( 19 pi / 6)

A:

Q: 2) Use a calculator to find the value of each expression rounded to tow decimal places. a. cos-1 0.6…

A: To find the value of  cos-1(0.6)  and  tan-1(-3.27) to two decimal places.

Q: Approximate the value to the nearest thousandth Cos 49°

A: Answer : The approximate value of cos(49°) to the nearest thousandth is written as ;    Cos(49°) =…

Q: 1. Find the value of x. 72°

A:

Q: Simplify without using a calculator. Tan(31 degrees) - cos(59 degrees) / cos (31 degrees) =

A:

Q: Approxamate the value to the nearest thousandth Tan 78°

A: From the given problem:   tan78°   So,   tan78° = 4.704630109

Q: Trigonometry Question

A:

Q: The angle of elevation θ of the sun in the sky at any latitude L is calculated with the formula…

A: The angle of elevation θ of the sun in the sky at any latitude L is calculated with the formula…

Q: Sin(16.35°)and csc(16.35°)

A: To find sin(16.35)° and csc(16.35)°

Fundamentals of Trigonometric Identities

Trigonometric Identities are the equalities that involve trigonometry functions and hold for all the values of variables given in the equation.