21
Chapter 2: Trigonometry Review
126. sec x – cos x
(A) 1
(B) sin x
(C) tan x
(D) cos x cot x
(E) sin x tan x
127. (sin x + cos x)
2
(A) 2 + sin 2x
(B) 2 + cos 2x
(C) 1 + sec 2x
(D) 1 + sin 2x
(E) 1 + cos 2x
128. sin(π – x)
(A) cos x
(B) sin x
(C) csc x
(D) sec x
(E) tan x
129. sin x sin 2x + cos x cos 2x
(A) cos x
(B) sin x
(C) csc x
(D) sec x
(E) tan x
Finding Common Trigonometric Values
120–124 Find sinθ , cosθ , and tanθ for the
given angle measure. Remember to rationalize
denominators that contain radicals.
120. θ π
= 4
121. θ π
= 5
6
122. θ
π
= −2
3
123. θ = − °
135
124. θ = °
180
Simplifying Trigonometric
Expressions
125–132 Determine which expression is equivalent
to the given one.
125. sin cot
θ
θ
(A) cosθ
(B) sinθ
(C) secθ
(D) cscθ
(E) tanθ