What is the value of sin(90°)?
A
0
B
1
C
√2/2
D
Undefined
Analysis & Theory
sin(90°) = 1 is a standard trigonometric value.
Which of the following is a Pythagorean identity?
A
sin²θ + cos²θ = 1
B
tan²θ + sec²θ = 1
C
cot²θ - csc²θ = 1
D
sec²θ - tan²θ = 1
Analysis & Theory
The identity sin²θ + cos²θ = 1 is fundamental in trigonometry.
What is the value of cos(0°)?
A
0
B
1
C
−1
D
Undefined
Analysis & Theory
cos(0°) = 1 by standard trigonometric values.
What is tan(45°)?
A
1
B
√3
C
0
D
Undefined
Analysis & Theory
tan(45°) = 1.
Which of the following is equal to 1 + tan²θ?
A
cosec²θ
B
sec²θ
C
cot²θ
D
cos²θ
Analysis & Theory
1 + tan²θ = sec²θ is a standard identity.
What is sin(30°)?
A
1/2
B
√3/2
C
0
D
1
Analysis & Theory
sin(30°) = 1/2 by standard angle values.
Which of the following is equal to cot θ?
A
1/sin θ
B
1/cos θ
C
cos θ / sin θ
D
sin θ / cos θ
Analysis & Theory
cot θ = cos θ / sin θ.
What is the value of sec(60°)?
A
2
B
1
C
2/√3
D
2/3
Analysis & Theory
sec(60°) = 1/cos(60°) = 2/√3.
Which of the following is correct?
A
sin θ = 1/cosec θ
B
cos θ = 1/sec θ
C
tan θ = sin θ / cos θ
D
All of the above
Analysis & Theory
All given expressions are true identities.
What is the value of sin²θ + cos²θ for any angle θ?
A
0
B
θ
C
1
D
2
Analysis & Theory
This is a standard identity: sin²θ + cos²θ = 1.