This in the article trigonometric equations solution non-standard methods about information given . Including both sides of the equation side one kind trigonometric to the function multiplication , both​ towards one odd number or one kind trigonometric function add and subtraction , proportion , mathematics analysis of elements , vectors scalar from the product use about information given and visols undress shown .

Function determination domain of the function limitation property , proportion , vector , scalar multiplication , number inequality , equations system , equations union .

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