Trigonometric Identities and Special Triangles Test

Unit Test #38

Select your answers to the following 10 questions from the pop-up menus in the right hand column. Clicking the "Begin Test Again" button will clear all the answers.

 

 

Q1:

 

sin2 A + cos2 A = x

What is x?

A.0
B. A
C.1
D. 2A
Answer 1:

 

Q2:

 

Which is the best type of triangle is useful for finding the trigonometric ratios for 45°? A. equilateral
B. right-angled
C. isosceles
D. right-angled isosceles
Answer 2:

 

Q3:

 

True or false?

sin x + cos x = 1

A. True
B. False
Answer 3:

 

Q4:

 

cos 51° = sin B°

What is the value of B?

A. 51
B. 39
C. 129
D. 25.5
Answer 4:

 

Q5:

 

tan C = 1

What is C?

A. 0
B. 30
C. 45
D. 60
Answer 5:

 

Q6:

 

sin2 51 + cos2 A = 1

What is A?

A. 51
B. 39
C. 129
D. 25.5
Answer 6:

 

Q7:

 

Which is the best type of triangle is useful for finding the trigonometric ratios for 60°? A. equilateral
B. scalene
C. isosceles
D. right-angled isosceles
Answer 7:

 

Q8:

 

True or false?

sin (A + B) = sin A + sin B

A. True
B. False
Answer 8:

 

Q9:

 

cos2 D = 1 - sin2 32

What is D?

A. 32
B. 64
C. 58
D. 148
Answer 9:

 

Q10:

 

True or false?

cos45 = sin 45 (don't use a calculator!)

A. True
B. False
Answer 10: