three trigo problems

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- Jan 17th 2008, 05:15 AMafeasfaerw23231233three trigo problems
three trigo problems

- Jan 17th 2008, 10:57 AMSoroban
Hello, afeasfaerw232312331

Quote:

22) Prove that in :

(a)

(b) Hence show that: .

(b) We have: .

. . . .

. . . .

. . . .

Multiply through by: .

. . . .

- Jan 17th 2008, 01:33 PMSoroban
Hello again, afeasfaerw23231233!

Quote:

26. is equilateral with

is a point outside the triangle such that: .

(a)(i) By considering , express in terms of

. .**[1]**

Quote:

(a)(ii) By considering , express in terms of

Since

.Then: .

We have: .

. . .**[2]**

Quote:

(b) Hence, find

. . . . . .

. .

. .

. . . . . .

. . . . . . .

. . . . . . . .

- Jan 27th 2008, 11:13 PMafeasfaerw23231233
i thought that the the diagram was a 3D pyramid-like solid! so i spent a great deal of time and could not do [a][ii]. now i know it is a 2D diagram. thanks