University:
High School
Course:
High School Mathematics
Academic year:

2019
Views:

201

Pages:

4
Author:

Camilla Dunn

The Sine and Cosine Ratio ---- In your own words, write the meaning of each vocabulary term. I sine ...,__.. Si cosine A =- _Qf'-f-.oS,·1--(. lee) h y f' o+t" LI'>e. angle of depression fhf.. Cl rt)le. 5 o ,-� ''Jok.-V' \" fro¥\'\ Core Concepts Sine and Cosine Ratios Let LiABC be a right triangle with acute LA The sine of LA and cosine of LA (written as sin A and cos A) are defined as follows. sinA - length of hyp0tenuse - fJ AB ? l cos A - } C..e>S length of leg adjacent to 1'. A length of hypotenuse g ':: A8 Sine and Cosine of Complementary Angles The sine of an acute angle is equal to the cosine of i� ¼'Djl'Y\ The cosine of an acute angle is equal to the sine of its complement. Let A and B be complementary angles. Then the following statements are true. sin A = cos(90 ° - A) = cos B sinB = cos(90 ° - B) = cosA cos A = sin(90 ° - A) = sin B cosB = sin(90° - B) = sinA 8G - AC AB