我们知道，锐角三角函数是在生产和生活实践中产生的，因此，我们学习锐角三角函数的目的之一，就是为了应用它来解决实际问题．事实上，中考中频频出现的此类试题正好印证了这一点．下面举1996年中考题为例说明常见题型及其解法．一、水平距离的测量倒1如图1，要测量湖中的A、 We know that the acute angle trigonometric function is produced in production and life practice. Therefore, one of the purposes of learning the acute angle trigonometric function is to apply it to solve practical problems. In fact, the frequent occurrence of such questions in the middle school exams just confirms this point. The following examples of 1996 exam questions illustrate common questions and their solutions. First, the measurement of the horizontal distance down 1 as shown in Figure 1, to measure the lake A,