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4.2: Trigonometric Ratios and Special Angles.
Transcript of 4.2: Trigonometric Ratios and Special Angles.
Scientists, engineers, and other professionals work with radians in many ways. For example, the variety of sounds possible in electronic music is created using trigonometric models. Also, the electricity produced by a power plant follows a trigonometric relation. In this chapter, we will learn about Cast Rule, how to determine exact trigonometric ratios of special angles, angles in standard position.
Trigonometric comes from two greek terms,
meaning triangle and
meaningmeasure. so, trigonometric is the study of triangle measurement.
The most common trigonometric ratios are
Sine= opposite/ hypotenuse
Cosine= adjacent/ hypotenuse
Tangent= opposite/ adjacent
ANGLES IN STANDARD POSITION
An angles is in
when it is centred at the origin,
the initial arm is the positive x-axis and the terminal arm rests
anywhere within the four quadrants.
How to determine trigonometric ratios with special angles.
4.2 Trigonometric Ratios and special angles.
By: Akanbi Ololade .F.
Define angles in standard position
State Cast Rule
How to determine trigonometric ratios with special angles
This video shows how to find the trigonometric ratios of the special angles and how to use them to find exact values of expressions.
Table of values of the 6 trigonometric functions
sin x, cos x, tan x, cot x, sec x
for special angles.
N.B The letter
Trigonometric is the study of relationship between the sides and angles of a triangle. the ratios of the sides in a right triangle with respect to its acute angles are called trtigonometric ratios of the angles.
McGraw-Hill Ryerson. (2008).
. Canada. Linda Allison Hsmathangccs 3. (2011). Unit 8a trigonometric. Retrieved from http: // www.google.ca/hsmathangcc.wiki.hci.edu.sg