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本文着重探讨三角函数y=sinx(1+cosx)与y=sinx(1-sinx)的最值问题。并利用它来求一大批三角函数的最值和证明一大批三角形中的不等式。理定1 设三角函数y=sinx(1+cosx),则对任何x∈R,有
This paper focuses on the problem of the trigonometric functions y=sinx(1+cosx) and y=sinx(1-sinx). And use it to find the best value of a large number of trigonometric functions and to prove a large number of inequalities in the triangle. Rule 1 Set the trigonometric function y=sinx(1+cosx), for any x∈R,