Trig CoFunctions (sin and cos)
Authored by Sarah Colasanto
Mathematics
9th - 10th Grade
CCSS covered
Used 227+ times
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12 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In ∆ABC, where ∠C is a right angle,
cos A= √21 ⁄ 5 . What is sin B?
√21 ⁄ 5
√21 ⁄ 2
2 ⁄ 5
5 ⁄ √21
Tags
CCSS.HSF.TF.C.8
2.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
In ∆ABC, the complement of ∠B is ∠A. Which statement is always true?
tan∠A = tan∠B
sin∠A = sin∠B
cos∠A = tan∠B
sin∠A = cos∠B
Tags
CCSS.HSF.TF.C.8
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which expression is always equivalent to sin x when 0°< x < 90°?
cos(90°−x)
cos(45°−x)
cos(2x)
cos x
Tags
CCSS.HSF.TF.C.9
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In right triangle ABC, m∠C =90°. If cos B= 5 ⁄ 13, which function also equals 5 ⁄ 13?
tanA
tanB
sinA
sinB
Tags
CCSS.HSF.TF.C.8
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
In scalene triangle ABC shown in the diagram above, m∠C = 90°. Which equation is always true?
sinA=sinB
cosA=cosB
cosA=sinC
sinA =cosB
Tags
CCSS.HSF.TF.C.8
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
If cos 32° = sinx, find the number of degrees in the measure of acute angle x.
32
78
58
68
Tags
CCSS.HSF.TF.B.7
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Find the value of R that will make the equation sin73°=cosR true when 0°<R<90°.
27
17
45
73
Tags
CCSS.HSF.TF.C.9
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