(1+costheta)(1-costheta) is equal to: 01:09 Sin A.cos A.tanA+cosA.sinA.cotA is equal to: 01:59 The value of cot^(2)theta-(1)/(sin^(2)theta) is: 01:27 If sec theta+tantheta+1=0,then sec theta-tan theta is: 01:39 If x=acos theta,y=b sin theta,then b^(2)x^(...
Prove the following identity : (sin theta)/(1+cos theta)+ (tan theta)/(1+cos theta)= sec theta cosec theta- cot theta.
【题目】已知$$ \sin \theta + \cos \theta = \frac { 1 } { 5 } $$,求sinθ、cosθ、tanθ的值.
{ 1 } { 5 } , \theta \in ( 0 , \pi ) $$,求下列各式的值:$$ ( 1 ) \sin \theta \cos \theta ; ( 2 ) \sin \theta - \cos \theta ; ( 3 ) \sin ^ { 2 } \theta - \cos ^ { 2 } \theta ; ( 4 ) \sin ^ { 3 } \theta + \cos ^ { 3 } \theta ; ...
Answer to: Prove the identity. {1 + cos theta} / {sin theta} + {sin theta} / {1 + cos theta} = 2 csc theta By signing up, you'll get thousands of...
Answer to: Prove the identity. sin theta(csc theta + cot theta) = 1 + cos theta. By signing up, you'll get thousands of step-by-step solutions to...
Doubtnut is the perfect NEET and IIT JEE preparation App. Get solutions for NEET and IIT JEE previous years papers, along with chapter wise NEET MCQ solutions. Get all the study material in Hindi medium and English medium for IIT JEE and NEET preparation ...
相关知识点: 试题来源: 解析 【解析】 解: $$ z = 1 + \cos \theta + i \sin \theta ( 0 \leq \theta 0 , | z | = 2 \cos \frac { \theta } { 2 } , a r g z = \frac { \theta } { 2 } $$ (2)当$$ \pi 反馈 收藏 ...
解① $$ z = 2 \cos ^ { 2 } \frac { \theta } { 2 } + i \cdot 2 \sin \frac { \theta } { 2 } \cdot \cos \frac { \theta } { 2 } \\ = 2 \cos \frac { \theta } { 2 } ( \cos \frac { \theta } { 2 } + i \sin \frac { \theta } { 2 } ) $$...
Doubtnut is the perfect NEET and IIT JEE preparation App. Get solutions for NEET and IIT JEE previous years papers, along with chapter wise NEET MCQ solutions. Get all the study material in Hindi medium and English medium for IIT JEE and NEET preparation ...