A 1. If 0° <0 < 90° and sin 0 = , find sin 260. 12 V95 V 95 144 7/95 144 7/95 72

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Q: 9. Expand the geometric series. Enter your answers separated by commas, with no spaces. 9. 23"-1

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A: Here, z=25(cos 240°+i sin 240°)⇒z=25ei240π180⇒z=25ei4π3

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