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[" 59."(sin A+sin5A+sin9A)/(cos A+cos5A+...

[" 59."(sin A+sin5A+sin9A)/(cos A+cos5A+cos9A)=],[[" 1) "tan3A," 2) "tan5A," 3) "tan4A," 4) "tan2A]]

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( sin A + sin 5A + sin 9A)/( cos A + cos 5A + cos 9A)=

(sin7A-sin5A)/(cos7A+cos5A)=tan A

(sin3A+sin5A+sin7A+sin9A)/(cos3A+cos5A+cos7A+cos9A)

(sin A-sin5A+sin9A-sin13A)/(cos A-cos5A-cos9A+cos13A)=cot4A

(sin A-sin5A+sin9A-sin13A)/(cos A-cos5A-cos9A+cos13A)=cot4A

Show that : (frac(sinA+sin5A+sin9A)(cosA+cos5A+cos9A))=tan5A

(sin3A+sin5A+sin7A+sin9A)/(cos3A+cos5A+cos7A+cos9A)=tan6A

(sin A+sin3A+sin5A+sin7A)/(cos A+cos3A+cos5A+cos7A)=tan4A

Prove that (sin5A-sin3A)/(cos5A+cos3A)=tanA .

Prove that: (sin3A+sin5A +sin7A+sin9A)/(cos3A+cos5A+cos7A+cos9A)=tan6A