Trigonometry Practice Test: answer key

Every answer, with a link to its step-by-step solution

#	Answer	Lesson	Solution
1	π/6	Degrees and radians	Solved step by step
2	75°	Degrees and radians	Solved step by step
3	B s ≈ 12.57	Arc length and sector area	Solved step by step
4	A ≈ 188.50	Arc length and sector area	Solved step by step
5	B 12	The unit circle	Solved step by step
6	−1	The unit circle	Solved step by step
7	−√32	Trig of any angle	Solved step by step
8	√32	Trig of any angle	Solved step by step
9	π/6	Inverse trig values	Solved step by step
10	30°	Inverse trig values	Solved step by step
11	1	Trig identities	Solved step by step
12	1	Trig identities	Solved step by step
13	(√6 + √2)/4	Sum and difference identities	Solved step by step
14	√22	Sum and difference identities	Solved step by step
15	D 2425	Double-angle identities	Solved step by step
16	−119169	Double-angle identities	Solved step by step
17	A x = 30°, 150°	Trig equations	Solved step by step
18	x = 90°, 120°, 240°, 270°	Trig equations	Solved step by step
19	x = 15°, 75°, 195°, 255°	Multiple-angle equations	Solved step by step
20	x = 30°, 150°, 270°	Multiple-angle equations	Solved step by step
21	B x = 90°, 210°, 330°	Trig equations like quadratics	Solved step by step
22	x = π/3, π, 5π/3	Trig equations like quadratics	Solved step by step
23	B b ≈ 10.8	The law of sines	Solved step by step
24	B ≈ 35.1°	The law of sines	Solved step by step
25	A c ≈ 6.2	The law of cosines	Solved step by step
26	B ≈ 48.5°	The law of cosines	Solved step by step
27	A = 10	Area of a triangle with sine	Solved step by step
28	A ≈ 29.5	Area of a triangle with sine	Solved step by step

Grade

Count your right answers and divide by the number of questions: A 90% or more, B 80%, C 70%, D 60%, F below 60%.