Question 3 of 8 > View Policies Show Attempt History Current Attempt in Progress Your answer is incorrect. Evaluate the definite integral. NOTE: Enter the exact answer. ti + taj dt = 0Question 4 of 8 5 View Policies Show Attempt History Current Attempt in Progress Your answer is partially correct. Calculate -[ri(t) . r2(t)] and ~ [ri(t) x r2(t)] first by differentiating the product directly and then by applying the formulas " [ri(t) . r2(t) ] = ri(t) . - dr2 , dri . (t) and dt + at [ri(t) x r2(t)] = ri(t) x dr2 | dri x rz(t). dt .+ at ri(t) = cos(t)i + sin(t)j + 2tk, r2(t) = i+ tk #[ri(t) . r2(t)] = 4t - sin(t) " [ri(t) x r2(t)] = (sin(t) + cos(t)) i - (cos(t) -t sin(t) - 2) j - cos(t) k XQuestion 5 of 8 5 View Policies Show Attempt History Current Attempt in Progress Your answer is partially correct. Find the domain of r(t) and the value of r(to). NOTE: Round your answer to two decimal places when needed. r(t) = cos(at)i - In(t)j + vt - 16k; to = 17 Domain is: ( , ly X 16 L NOTE: Enter your answer in terms of i, j, and k. r(17) = i - In(17) j + k XQuestion 8 of 8 View Policies Current Attempt in Progress Find T(t) and N(t) at the given point. x = e cost, y = esint, z= e; t=0 T(0) = N(0) =