1. Which expression is equivalent to cos ( ? – 2pi)?
–cos ?
sin ?
cos ?
–sin ?
2. Which expression is equivalent to cos 2 ? for all values of ? ?
cos^2 ? – 1
1 – 2 sin^2 ?
2 sin ? cos ?
cos^2 ? – sin^2 ?
3. Solve cos x tan x - sin^2x = 0 for all real values of x.
?k, ?/2 + 2?k
?/2 + ?k, 2?k
?/2 + 2?k, 3?/2 + 2?k
4.Solve csc x + 2 = 0 for 0 x < 2?
?/6 and 5?/6
?/6 and 7?/6
4?/3 and 5?/3
7?/6 and 11?/6
–cos ?
sin ?
cos ?
–sin ?
2. Which expression is equivalent to cos 2 ? for all values of ? ?
cos^2 ? – 1
1 – 2 sin^2 ?
2 sin ? cos ?
cos^2 ? – sin^2 ?
3. Solve cos x tan x - sin^2x = 0 for all real values of x.
?k, ?/2 + 2?k
?/2 + ?k, 2?k
?/2 + 2?k, 3?/2 + 2?k
4.Solve csc x + 2 = 0 for 0 x < 2?
?/6 and 5?/6
?/6 and 7?/6
4?/3 and 5?/3
7?/6 and 11?/6