2. Trigonometric Functions on Right Triangles
Cofunctions of Complementary Angles
2. Trigonometric Functions on Right Triangles
Cofunctions of Complementary Angles - Video Tutorials & Practice Problems
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concept
Cofunction Identities
Video duration:
6mPlay a video:
2
Problem
ProblemWrite the expression in terms of the appropriate cofunction.
cos(4519π)
A
cos(907π)
B
sin(454031π)
C
sin(907π)
D
cos(904031π)
3
Problem
ProblemWrite the expression in terms of the appropriate cofunction.
cot(25°)
A
tan(65°)
B
tan(25°)
C
cot(65°)
D
cot(25°)
4
concept
Using Cofunction Identities to Solve Equations
Video duration:
4mPlay a video:
5
Problem
ProblemFind the acute angle solution to the following equation involving cofunctions. θ is in degrees.
cos(2θ+15)=sin(5θ+12)
A
1°
B
4°
C
6°
D
9°
6
Problem
ProblemFind the acute angle solution to the following equation involving cofunctions. P is in degrees.
sec(54P+20)=csc(85P+4223)
A
5°
B
10°
C
12°
D
15°
7
Problem
ProblemFind the acute angle solution to the following equation involving cofunctions. M is in radians.
tan(2M+5)=cot(M−5)
A
2π
B
4π
C
3π
D
6π
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