The value of $\frac{x^{-1}}{x^{-1}+y^{-1}}+\frac{x^{-1}}{x^{-1}-y^1}$ is equal to

Chapter-Wise 3D Mathematics, English, General Knowledge/General Awareness Videos from R. Gupta Combined Defence Services Examination

36 min 53 sec

Introduction to Logarithms

This video discusses the basic concepts of Laws of Logarithms. After watching this video you will have a clear idea about how to solve the problems related to this topic.

02 min 31 sec

Problems on Sub-multiple Angles

We all know the identities involving multiple angles in trigonometry. Watch the video to learn how to use multiple and submultiple trigonometric ratios.

04 min 13 sec

How to Describe the Formula of sin3A, cos3A and tan3A

How can you find a trigonometric ratio of 3α using compound angles and double angles? Watch the video to derive the formula for sin3α, cos3α and tan3α.

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