For positive acute angles A and B, it is known that tan A=45/28 and Sin B=4/5. Find the value of cos (A-B) in simplest form.

An assembly consists of two mechanical components. suppose that the probabilities that the first and second components meet specifications are 0.87 and 0.84. assume that the components are independent. determine the probability mass function of the number of components in the assembly that meet specifications. x

What is the measure of angle tvu shown in the diagram below

Water flows at a steady rate from a tap. its takes 40 seconds to fill a 4 litre watering can from the tap. the rate at which water flows from the tap is halved. complete: 4 litres into cm3