- If x= in tan (θ/2), y= tan θ, prove that (d^2y/dx^2)= tan^2θsinθ(cosθ+2secθ)?

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How many moles of glucose would be needed to lower the freezing point of one kg of water 3.72°C? How many radians does the minute hand of a clock rotate through in 15 minutes? The length and width of a rectangular patio are, (x + 8) ft & (x + 6) ft,area of patio is 160 square ft what are the dimensions of the patio? Which lunar phase would be observed from the Earth, if the moon were at a 90° angle with the earth and sun? Please show step -by- step how to solve the following problem. Please show how to reduce to least terms. Thank you. 36/(1 + 1/5)^2?