Student Reader

Trigonometry

sinsin θ = cos ( θ - ½ π )
coscos θ = sin ( θ + ½ π )
Small Angle Approximations

When θ is extremely small, for example if one cathetus is several orders of magnitude than the other, we can use the following approximations:

sin θ ≈ θ
cos θ ≈ 1 - ½ θ2
tan θ ≈ θ

homeaccount_circle
TrigonometryComments
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017