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What will be the chemical reaction of NaOH with sea water? Hence solve the equation 2tan^2 x sin^2 x=1 for 0less than or equal to x and x less than or equal to 360? What is the relationship between temperature, energy, and wavelength? Show that the equation 2tan^2 x sin^2 x=1 can be written in the form 2sin^4 x +sin^2-1=0? Math: law of cosines, help?