8.6. Sine, Cosine, Tangent http://www.ck12.org
MEDIA
Click image to the left for use the URL below.
URL: http://www.ck12.org/flx/render/embeddedobject/52518CK-12 Foundation: Chapter8SineCosineTangentB
Concept Problem Revisited
The trigonometric ratios for the non-right angles in the triangle above are:
sinA=^45 ,cosA=^35 ,tanA=^43 ,sinB=^35 ,cosB=^45 ,and tanB=^34.
Vocabulary
Trigonometryis the study of the relationships between the sides and angles of right triangles. The legs are called
adjacentoroppositedepending on whichacuteangle is being used. The three trigonometric (or trig) ratios aresine,
cosine, andtangent.
Guided Practice
Answer the questions about the following image. Reduce all fractions.
- What is sinA?
- What is cosA?
- What is tanA?
Answers: