About Lesson
7.3 三角函数的诱导公式 Induced Formula of Trigonometric Functions [练习题]
(1)
Find the value of 计算
Find the value of 计算
(a)
(b)
Answer 答案:
(a) 1
(b) 0
2. Simplify 化簡
(a)


(b)


(c)


(d)
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(e)


Answer 答案:
(a)

(b)
(c)
(d)
(e)
(3)
In ∆ABC, prove that
In ∆ABC, prove that
