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  3. 4 [20% ] (a) prove the sine rule for a spherical t

4 [20% ] (a) Prove the Sine Rule for a spherical triangle: [10%] sin ? sin a...

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Basic Math

4 [20% ]

(a) Prove the Sine Rule for a spherical triangle: [10%] sin ?sin a = sin ? sin b = sin ? sin c

(b) Show that the area of a spherical triangle on the unitsphere is [10%] ? + ? + ? ? ? .

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