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Y10 trigonometry by

Trigon­ometric Functions

pythag­oras's theorem

Sine and cosine rule

Sine rule finding side example

Sine rule Finding Angles example

Subtract angles of depression by 90 degrees

 

Similarity Test for Similar Triangles

Scale Factor

Scale Factor
Scale factor is the ratio between the scale of a given original object and a new object, which is its repres­­en­t­ation but of a different size (bigger or smaller).
sf = larger figure dimensions ÷ smaller figure dimensions

true bearings

angle of elevation example

angle of depression example

 

Examples of Trigon­­om­etric functions

Examples of inverse functions

to solve A: sin-1 (a / c) or cos-1 (adjac­ent­/hy­pot­enuse) or tan-1 (a/b)
to solve B: sin-1 (b/c) cos-1 (a/c) tan-1 (b/a)

conven­tional bearings

 

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