Complete each double-angle identity.   cos 2 theta = _______

Q: Through how many radians does the hour hand on a clock rotate in (a) 24 hr and (b) 4 hr?

A: Since a clock is a circle it is equal to 2π radian One full rotation takes 12 hours to complete. So…

Q: Find the EXACT value of each expression. DO NOT use a calculator. a) Cot 120◦   b) Cos 495◦

A: We can write an angle of 120 degrees as (90 + 30). Therefore, we get cot 1200 = cot (90 + 30)0  We…

Q: Find the radian measure of the central angle. radians 28 7

A:

Q: Use a trig identity and special angles to find the exact value of cos ((5π)/(8)). Do not use a…

A: We have to find exact value of cos5π8 We know that cosπ-θ=-cosθ Therefore, cos5π8=cosπ-3π8=-cos3π8…

Q: Cannot solve

A: Given the angle:

Q: The minute hand of a clock moves from 12 to 4 o’clock, or 13 of a complete revolution. Through how…

A:

Q: a. sino = cos0 = (-15, -20)

A: Use trigonometric ratios.

Q: 2. Convert the following: radians to degrees 225° to radians

A:

Q: 13 T to degrees: 6 Convert 390 Convert 896° to radians:

A: the solution is given below

Q: The minute hand of a clock moves from 12 to 2 o’clock, or 1/6 of a complete revolution. Through how…

A: One revolution measures 360 degrees

Q: B A Find cos(8) in the triangle. Choose 1 answer:

A:

Q: Use a half angle or reduction formula to fill in the blanks in the identity below: (cos(3x))? = cos(…

A: (cos(3x))^2=(1/4) + (1/4) +(cos(6x/2))

Q: Use a half angle or reduction formula to fill in the blanks in the identity below: (cos(4x))? = cos(…

A: Here I am attaching image so that you understand each and every step.

Q: If A = 32 degree, B = 70 degree , and a = 3.8 inches, use the law of sines to find b.

A:

Q: Use Half-angle Formulas to find the exact value of each expression; cos 22.5°

A: As value of cosθ and sinθ revolves around +1 to -1 , they take different values depending on the…

Q: Give each degree measure in radians and radian measure in degrees. 9n 5 54° 243° 45

A: we use 1°=π/180 radian and 1radian=180/π degree. see 2nd step.

Q: A point on the terminal side of an angle 0 in standard position is (-5,- 6). Find the exact value of…

A:

Q: Use a half angle formula to fill in the blanks in the identity below: (cos(5z))? =| Cos

A: We know that cos(2z)=2cos2(z)-1 is a double angle formula. Here we will use z=5x…

Q: use the half-angle identities to find the exact values of the trigonometric expressions.…

A: To find the value of csc-5π8 Using half identities

Q: Use an appropriate Half-Angle Formula to find the exact value of the expression. cos(112.5°)

A: Solving the problem by half angle formula.

Q: Find each angle measure to the nearest degree. cos B= √2/2

A: Explanation of the answer is as follows

Q: 6. CoS 8,

A: Half angle formula of trigonometric formula

Q: Find each angle measure to the nearest degree. You must use the 2nd key when looking for inverses.…

A: we want to find correct answer for question

Q: Find the exact value of each angle given. Cos 105°

A: To be found : Value of cos 105°

Q: 3. The minute hand of a clock moves from 12 to 4 o'clock, or 1/3 of a complete revolution. Through…

A:

Q: Use identities to find the values of the sine and cosine functions for the following angle measure…

A:

Q: Refer to the appropriate triangle or trigonometric identity to compute the given value. cot(csc-1 2)

A:

Q: Which of the following is a Pythagorean identity? sin28 + csc?0 = 1 A. C.1+ cot20 = csc2e В. tan20 –…

A:

Q: -51 radians is an angle that terminates in the second quadrant. True False

A: Given statement, That -5 pi radians is an angle terminates in the second quadrant

Q: (a) (-35, –12) sin(8) cos(0) tan(8) csc(8) sec(0) cot(8)

A: here we need to find all trigonometric ratios. the solution is following

Q: Find cosec  theta  if cot  theta = 24/7

A:

Q: Convert each radian measure into degrees. 4 O -140° O None of the other answers are correct O -135°…

A: Given: radian measure = - 3π/4 Formula for radian-degree conversion is : Degrees = (180°/π) ×…

Q: Suppose cos 2A = and 2A is an angle in the Third Quadrant. | 7' Then cos A

A: The trigonometric identity for cosine is cos 2x=2cos2 x−1.

Q: Determine the identity that best describes each equation а. cot20 = csc²0 – 1 b. tane cot0 = 1 С. =…

A: Given that:                     a. cot2θ=csc2θ-1b. tanθcotθ=1c. 1cosθ=secθ

Q: 9.프 rad 11n 10. rad 11. rad 4 12. - rad 4 3.

A: We know that an angle say 'a' in radian is converted to degree by using the following formula:…

Q: Use a double or half-angle identity to find the exact value of each expression below.   Given that…

A: Given, π< θ<3π2cotθ=43To find cos2θFormula: cos2θ =2cos2θ -1

Q: Find each quotient. Write answers in rectangular. First convert the numerator and the denominator to…

A:

Q: 1. How many degrees is 1 of a complete revolution? 2. How many radians is of a complete revolution?

A: 1. How many degrees is 1 of a complete revolution? The measure of one complete revolution is 360…

Q: Use the Half-Angle Identities to find each exact value. 5. cos 112.5°

A: We are given cos 112.5 and we have to find its exact value. The solution is given below:

Q: Find each angle measure to the nearest degree. You must use the 2nd key when looking for inverses.…

A: tanB=0.4040 B=arctan(0.4040) B=22    (by using calculator) Option A is correct.

Q: Use a half angle or reduction formula to fill in the blanks in the identity below: (cos(3z))? = cos(

A:

Q: Use identities to find the values of the sine and cosine functions for the following angle measure.…

A: We can solve this as follows:

Q: Use a half angle formula to fill in the blanks in the identity below: (cos(42))? = cos( x) +

A:

Q: Use a half angle formula to fill in the blanks in the identity below: (cos(7))? cos(

A:

Q: The minute hand of a clock rotates -8 pi. How many radians does the hour hand rotate? (For every 360…

A: Given: Minute hand of clock rotates -8π radians  [ negative sign representing clockwise rotation]…

Q: The minute hand of a clock moves from 12 to 4 o’clock, or 1/3 of a complete revolution. Through how…

A: Given: The minute hand of a clock moves from 12 to 4 o'clock. The minute hand turns 13 of a…

Q: (卡) 11n Write cos in terms of the cosine of a positive acute angle. 18

A: We need to write the cos in terms of positive acute angle

Q: Fill in each blank with an angle between 0 and 360° such that sin 71° = sin and cos 71° = cos

A: