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Chapter 3, "Trigonometry Snippets"Degrees to RadiansAngle in degrees * = angle in radians. Radians to DegreesAngle in radians * = angle in degrees. Trigonometric Functions
where opp = the side opposite a , adj = the side adjacent to a , and hyp = the hypotenuse . Other Trigonometric Functions
where opp = the side opposite a , adj = the side adjacent to a , and hyp = the hypotenuse. Period of the Sine WaveFor y = sin( Bx ), the period = . Amplitude of the Sine WaveFor y = A sin( x ), the amplitude = A . Unit Circle Identitycos 2 a + sin 2 a = 1 Tangent and Cotangent
Negative Anglessin( “ a ) = “sin a cos( “ a ) = cos a tan( “ a ) = “tan a Sum and Difference Identities for Sinesin( a 1 + a 2 ) = sin a 1 cos a 2 + cos a 1 sin a 2 sin( a 1 “ a 2 ) = sin a 1 cos a 2 “ cos a 1 sin a 2 Sum and Difference Identities for Cosinecos( a 1 + a 2 ) = cos a 1 cos a 2 “ sin a 1 sin a 2 cos( a 1 “ a 2 ) = cos a 1 cos a 2 + sin a 1 sin a 2 |
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