I C om m on C ore State Standards
T r i n n n n m ^ t r i r P n t i n c G-SRT.C.8 Use trigonometric ratios and the
y IX U IlU a Pythagorean Theorem to solve right triangles in applied
problems. Also G-SRT.C.6
Objective To find and use trigonometric ratios
There is a lot of
in fo rm a tio n h e r e.
Choose what you
need to solve th e
problem.
MATHEMATICAL
PRACTICES
M P 1, MP 3, MP 4, MP 5, MP 5, MP 6
Lesso n
Vocabulary
trigo n om etric
ratios
- sin e
- c o s in e
- t a n g e n t
- a n g le o f
elevation
- a n g le o f
depression
The Solve It involves ratios and right triangles. Ratios of the side lengths of a
right triangle are called trigonometric ratios. Below are the definitions of three
trigonometric ratios.
Key Concept Trigonometric Ratios
Name Written Definition
sine of LA sin A length of leg opposite length of hypotenuseLA^
cosine of LA cos A length of leg adjacent to length of hypotenuseLA^
tangent of LA tan A length of leg adjacent to length of leg opposite LALA^
Essential Understanding You can use the sine, cosine, and tangent ratios to
find the measurements of sides and angles of right triangles.
Po w erA lg eb r a.co m Lesson 10-6 Tr ig o n o m et r i c Rat io s 645
