# Oblique Triangles and Identities

A) Verify the following Identities :

i) [(Sin 2theta)/ (sin theta )- ( cos 2theta/ cos theta )] = sec theta

ii) cos2x = (cot^2 x-1 )/ (cot^2 x-1 )

And,

ììì) Use logarithms and the law of tangents to solve the triangle

ABC, given that a= 21.46 ft, b= 46.28 ft, and C = 32° 28' 30"

https://brainmass.com/math/triangles/162530

#### Solution Summary

Oblique Triangles and Identities are investigated.

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