- If sin B=-1/3 and B in Q3 find cotB/2?

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A unit vector in the same direction as v=12i +15j is ? What is this as an equation the product of v and 346 is equal to a plus 85? Which reaction types is most characteristic of alkenes? substitution addition elimination combination decomposition? F(x)=(2x+7)/(x^3-1) What is the f^-1(f^-1(x))? Which of the following is the correct structural formula of 2-butyne? CH≡CCH2CH3 CH3C≡CCH3 CH3CH=CHCH3 CH3CH2≡CH2CH3?

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