By George Biddell Airy

ISBN-10: 1418179310

ISBN-13: 9781418179311

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**Extra resources for A treatise on trigonometry**

**Example text**

0. , == 0 , 3cos0<50-f cos

T = wm.

T = W + w(a - s0). i+- W (2) (a — s0).

The corners A and C, B and D are joined by two light elastic strings under tension, of equal natural length and each having a modulus of elasticity equal to 2 W. The system is freely suspended from A so as to h a n g in a vertical plane. Show t h a t in t h e position of equilibrium AC = 4 a / } 5 , provided the natural length of each string is less t h a n 2a/V5. 8. Four equal uniform rods each of length a are freely jointed together to form a framework ABCD which is suspended from the joint A.