Problems
Problem 2.1:
Why do the following pairs of functions always have the same sign: sine
and cosecant, cosine and secant, tangent and cotangent?
[Solution]
Problem 2.2:
In which quadrant do the most trigonometric
functions have negative signs?
[Solution]
Problem 2.3:
Which value in the following group is not equal to the others:
sin(),
cos(π),
cot(),
sec(0)?
[Solution]
Problem 2.4:
Which value in the following group has a different sign from the others:
sin(),
sec(),
cot(),
cos()?
[Solution]
Problem 2.5:
When
θ = π, which two trigonometric functions are undefined?
[Solution]
),
cos(π), cot(
), sec(
),
cot(
), cos(
)?
[Solution]
