【题目】实式训练1设$$ \tan 2 \theta = 2 \sqrt { 2 } $$且$$ \theta \in ( \frac { \pi } { 2 } , \pi ) $$,求:(1)tanθ的值;2)年$$ \frac { \sin \theta + 2 \sin ^ { 2 } \frac { \theta } { 2 } - 1 } { \sqrt { 2 } \cos ( \frac { \pi...
यदि tan 2theta. tan 3theta = 1 है, जिसमे 0^(@) lt theta lt 90^(@) है, तो theta का मान है-
【解析】 解:由题意得$$\left\{ \begin{matrix} \tan \theta = 2 , \\ \sin ^ { 2 } \theta + \cos ^ { 2 } \theta = 1 \end{matrix} \right.$$ 即$$\left\{ \begin{matrix} \frac { \sin \theta } { \cos \theta } = 2 , \\ \sin ^ { 2 } \theta + \cos ^ { 2...
What is the simplified value of [(1+sec2θ)tan2θ]+1 ? Acos2θ B1 Csec2θ DcosecθSubmit What is the simplified value of [(1+sec2θ)tan2θ]+1 ? Acos2θ B1 Csec2θ DcosecθSubmit What is the simplified value of 3cosec2θ+51+tan2θ−2cos2θ? A3 B4 C5 D7SubmitThe...
Answer to: Verify: tan(theta/2) = csc(theta) - cot(theta). By signing up, you'll get thousands of step-by-step solutions to your homework...
考点7 二倍角的正弦、余弦、正切公式例7(1)已知$$ \tan \theta = 2 $$,则tan2θ的值是 (D) A.$$ \frac { 4 } { 3 } $$ B.$$ \frac { 4 } { 5 } $$ C.-$$ \frac { 2 } { 3 } $$ D.-$$ \frac { 4 } { 3 } $$(2)化简$$ \frac { \cos ^ { 2 } 5 ^ ...
यदि (1-tan^(2) theta)/( sec^(2) theta) = (1)/(2) तों theta के व्यापक मान है।
15.【解析】原式$$ = \frac { \cos \theta - \sin \theta } { \cos \theta + \sin \theta } = \frac { 1 - \tan \theta } { 1 + \tan \theta } $$ ∵$$ 2 \theta \in ( \pi , 2 \pi ) $$.∴$$ \theta \in ( \frac { \pi } { 2 } , \pi ) $$.而$$ \tan ...
tan2(2θ)−tan2θ1−tan2(2θ)tan2θis equal to- View Solution ∫(1−cosθ)2dθis equal to View Solution The value off(k)=∫π/20log(sin2θ+k2cos2θ)dθis equal to View Solution Iftanθ+cotθ=2,thentan2θ+cot2θis equal to ...
使用正切的定义求单位圆直角三角形的已知边。象限将决定每一个值的符号。 tan(θ)=对边相邻tan(θ)=对边相邻 求单位圆三角形的斜边。由于已知相对边和相邻边,所以可以使用勾股定理求第三条边。 斜边=√对边2+相邻2斜边=对边2+相邻2 替换方程中的已知值。