About Lesson
10.5 Graphical Solutions of Trigonometric Equations 三角方程式的图解法
(1) Sketch on the same diagram, the curves and for the interval . State the number of solutions in the interval of the equation .
在同一个图,描曲线 和 当 . 试说明在 的区间方程式 有多少个解.
Answer :
4
(2) Sketch and for and find the number of solution for .
在中描 和 且求 有多少个实数解。
Answer :
6
(3) Find the number of solution for the equation where .
求在 中, 有多少个实数解。
Answer :
4
(4) Sketch the graph of = for . By sketching a suitable straight line on the same diagram, find the number of solution for +=.
描图 = 当 . 在同一个图描一适当的直线,求 += 有多少个实数解有多少个实数解。
Answer :
5
(5) Sketch the graphs of such that .
Hence, obtain the number of solutions of
Hence, obtain the number of solutions of
描图当 .
据此,找 有多少个实数解
Answer :
4