4. Without a calculator, find all the exact values. 2 cos? a - 5 cos a 3

Q: Find the exact value of each expression .cos-1(-1).

A: To find the exact value of cos-1-1. Solution: Principal range of the cos-1x is 0,π. Evaluating the…

Q: Which of the following is the greatest?   a. cos 17o   b. cos 47o   c. cos 67o   d. cos 37og

A: It is known that y=cosx is a decreasing function on 0, 90°.

Q: find the exact value of each expression. do not use a calculator. 13) sin(13pi/12)cos(pi/12) 15)…

A:

Q: Find the exact value of cos(155°)cos(35°) + sin(155°)sin(35°). O A. -2

A: cos155ocos350+sin1550sin350 =?

Q: Find the value of each expression without using a calculator. 1.) a. sin 180° b. cos 180° 2.) a.…

A:

Q: C 25 7 T

A:

Q: Find the exact value of the expression cos 11π/6. Do not use a calculator.

A: To find the exact value of the expression,cos11π6. Solution: The given expression is , cos11π6…

Q: Cos 12

A:

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

A:

Q: Find the exact value. a. cos, 2.

A: a. Obtain the value of cos3π2, cos3π2=cos2π-π2=cosπ2=0   Thus, the exact value of cos3π2 is 0.

Q: secx 11. cotx+tanx sinx

A:

Q: -11m. ii. cos-1(cos()) CO 6.

A: Given problem:- cos-1(cos(11π6))=?