What are all of the solutions to the equation cos 30 cos 8 1

The expression O sin e O cos e O tan e O cot e 1 sin 0 simplifies to which of the following cos8

The expression Step 1 Step 2 sec x tan x 1 COS X tan x Step 4 1 Step 3 cos x sin x COS X 1 sin x secx 1 tan x 1 tan x 1 tan x COS X sin x COS X sin x Step 5 cscx COS X sin x Step 6 csc x cotx Which identity formula was simplified with the following steps

Which of the following expressions does cos x y cos x y simplify to O2 sin x sin y O 2 sin x cos y O 2 cos x cos y O 2 cos x sin y

Which of the following expressions could not be used to determine the exact value of cos 120°? O cos^2(60°) - sin^2(60°) O2cos^(60°) - 1 O 2sin(60°)cos(60°) O 1 - 2sin^2(60°)

Given sin x=- 15/17 and cos x > 0, what is the exact solution of cos 2x? O161/289 O225/289 O161/289 O225/289