.Let cos(alpha)=-(1)/(4) and -pi<alpha<-(pi)/(2) Use the information to find the value of sin((alpha)/(2)) cos((alpha)/(2)) and tan((alpha)/(2))
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.Let cos(alpha)=-(1)/(4) and -pi<alpha<-(pi)/(2) Use the information to find the value of sin((alpha)/(2)) cos((alpha)/(2)) and tan((alpha)/(2))
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