theta = \frac { m } { \sqrt { 1 - m ^ { 2 } } } $$;(3)若 $$ \theta = 2 k \pi + \frac { \pi } { 2 } ( k \in Z ) \cos \theta = m = 0 \sin \theta $$x= 1,tanθ不存在,$$ \cot \theta = 0 $$;(4)若θ为第二象限 的角,$$ \sin \theta = \...
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Prove that (cos theta)/(sin(90^(@)+theta))+(sin(-theta))/(sin(180^(@)+theta))-(tan(90^(@)+theta))/(cot(theta))=3 View Solution (cos theta)/(sin(90^(@)+theta))+(sin(-theta))/(sin(180^(@)+theta))-(tan(90^(@)+theta))/(cot theta) View Solution (tan theta+cot ...
The cotangent function is positive in the first and third quadrants. The set of solutions for are limited to the third quadrant since that is the only quadrant found in both sets. 解位于第三象限。解题步骤 2 使用余切的定义求单位元直角三角形的已知边。象限将确定每一个值得符号。
解析 【解析】 解(1)由 $$ \sin \theta 0 $$可知θ的终边在第一象限或第三象限, 所以角θ的终边在第三象限. (2)由题意,得$$\left\{ \begin{matrix} \cos \theta = 0 \\ \cos \theta > 0 \end{matrix} \right.$$或$$\left\{ \begin{matrix} 4 0 \times 2 ...
【题目】已知$$ \cot ( \sin \theta ) \cdot \tan ( \cos \theta ) > 0 $$,角θ是第__象限.
Answer to: Prove the identity. cot theta /csc theta = cos theta By signing up, you'll get thousands of step-by-step solutions to your homework...
If 8theta = pi show that cot 7theta+cot theta = 0 01:53 4-cot((pi)/(4)+theta)cot((pi)/(4)-theta)=1 02:24 if 8 theta=pi show that cos7 theta+cot theta=0 01:13 cot((pi)/(4)+theta)cot((pi)/(4)-theta) is 01:29 Number of solutions of the equation cot( theta ) ...
Prove that (cottheta+cosectheta-1)/(cottheta-cosectheta+1)=(1+costheta)/(sintheta) View Solution Prove thatcosecθ+cotθcosecθ−cotθ=(1+cosθsinθ)2. View Solution Prove thatsinθ1−cosθ=cosecθ+cotθ. View Solution
5.函数$$ f ( \theta ) = | \sin \theta + \cos \theta + \tan \theta + \cot \theta + s