lfcosec θ + cot θk then prove that cos θ\frac{k^{2}-1}{k^{2}+1} – InterviewSolution

InterviewSolution

1.	lfcosec θ + cot θk then prove that cos θ\frac{k^{2}-1}{k^{2}+1}
Answer» let a be theta and k = p

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