![1 Use the diagram below to answer the question that follows. Calculate the length of BC. 3.2 If tan θ + 15 = 0 and θ ∈ [90, 270], with the aid of a diagram, determine: 3.2.1 sin θ + cos θ 3.2.2 1/cos θ. 3.3 In rectangle ABCD, AB = 3x and BC = 4x. Find the length of AC and BD in terms of x.](/_next/image?url=https%3A%2F%2Fohijasnjvprzodcmxltt.supabase.co%2Fstorage%2Fv1%2Fobject%2Fpublic%2Fwhatsapp-images%2F1780270849984-6aa4525840ed066b.png&w=3840&q=75)
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Question 3: 3.1 Calculate the length of BC. Step 1: Identify the right-angled triangle DCE. The diagram shows a right angle at C, meaning DCE = 90^. We are given DE = 17 cm and CE = 8 cm. Using the Pythagorean theorem (a^2 + b^2 = c^2) in DCE: DC^2 + CE^2 = DE^2 DC^2 + 8^2 = 17^2 DC^2 + 64 = 289 DC^2 = 289 - 64 DC ✂️ _That answer was long and got cut off. Reply continue and I'll finish it._