- Suppose that tan(t)=20/21 where t is in the third quadrant. Find sin(2t)?

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Find the product and write the result in standard form: 1. (-6+2i)(4+i)= I got -26+2i
2. (7+4i)(5-6i)= I got 59-22i
Correct? Write a balanced equation for an acid dissassociation reaction of nitrous acid, HNO2, including the physical state of each species.? When 284 grams of P2O5 are reacted with 72 grams of H2O, what is the theoretical yield of H3PO4? What is the average velocity in a pipe, if the diameter of the pipe is 0.82 cm and the flow rate is 90 cm^3/s? Math Question... Is 0 not the correct answer for the last one?