Find an equation for the line tangent to the curve at the point defined by the given value of t.%E2%80%8B Also, find the value of StartFraction d squared y Over dx squared EndFraction at this point. xequals8 cosine t%E2%80%8B, yequals8 sine t%E2%80%8B, tequalsnegative StartFraction pi Over 4 EndFraction The equation nothing represents the line tangent to the curve at tequalsnegative StartFraction pi Over 4 EndFraction . %E2%80%8B(Type an exact%E2%80%8B answer, using radicals as%E2%80%8B needed.) The value of StartFraction d squared y Over dx squared EndFraction at tequalsnegative StartFraction pi Over 4 EndFraction is nothing.