DO NOW Pick up a folder off the table and write your name on the tab. This is the folder you will turn all quizzes and tests into. It will be alphabetically placed in the top drawer of the filing cabinet.

Find the following to the 4 decimal places Make sure your calculator is in radian mode or degree mode. Use correct mode or your answer will be wrong!Mode Sin 2.34R = radians Cos 5π/8 =radians Tan 125° =degrees Csc 3π/5 =radians Cot 48° = degrees Sec 3π/7 =radians

Fill in the unit circle handout: –Degrees –Radians Approximate decimals for quadrantals –π/2 ≈1.57 R, π ≈ 3.14, 3π/2 ≈ 4.71, 2π ≈ 6.28 We will use this same sheet the rest of the term. Do not lose it. You will not get a new one.

Notice angles that are multiples of 45° have a 4 in the denominator in radians Multiples of 30° have a 6 in the denominator Multiples of 60° have a 3 in the denominator Approximate decimals for quadrantals –π/2 ≈1.57 R, π ≈ 3.14, 3π/2 ≈ 4.71, 2π ≈ 6.28 THIS WILL BE IMPORTANT LATER! We will use this same sheet the rest of the term. Do not lose it. You will not get a new one.

2.15 R 5π/8 1.0 R 7π/6 7π/ R

θ MUST BE IN RADIANS!!

Converting from degrees to radians and radians to degrees 137° to radian measure 5π/11 to degree measure 147° to radians to the 4 decimal place

The diameter of a circle is 20 cm and the measure of the central angle is 130°. A. find length of arc B. find area of corresponding sector First: write the equations Second: draw picture and plug values Third: solve θ must be in radians to use formulas

Must be in radians not degrees. We must convert: Formulas? Solve: s = rθ 20 cm 130º

Convert 20 rpms to rad/sec

Convert 1 revolution in 4 hours to rad/min 2

Find the angular velocity of the minute hand of a clock in one minute. Convert to rad/sec 30

–p. 106 # 7-17 odd, odd –p. 113 # 1-9, odd, 39-42, 47-48, and pick one from –p.55 # 1-7 all, 8-15 all (handout/ problems for a different book)