Two trigonometric identities are given by: (a) cos 2 x − sin 2 x = 1 − 2 sin 2 x (b) tan x sin x − 2 tan x = 1 cos x − 2 For each part, verify that the identity is correct by calculating the left and right sides of the equation, substituing x = π / 1 0 .
Two trigonometric identities are given by: (a) cos 2 x − sin 2 x = 1 − 2 sin 2 x (b) tan x sin x − 2 tan x = 1 cos x − 2 For each part, verify that the identity is correct by calculating the left and right sides of the equation, substituing x = π / 1 0 .
For each part, verify that the identity is correct by calculating the left and right sides of the equation, substituing
x
=
π
/
1
0
.
Equations that give the relation between different trigonometric functions and are true for any value of the variable for the domain. There are six trigonometric functions: sine, cosine, tangent, cotangent, secant, and cosecant.
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Fundamental Trigonometric Identities: Reciprocal, Quotient, and Pythagorean Identities; Author: Mathispower4u;https://www.youtube.com/watch?v=OmJ5fxyXrfg;License: Standard YouTube License, CC-BY