Category: Trigonometry

Question Number 102587 by 1549442205 last updated on 10/Jul/20 $$\mathrm{Prove}\mathrm{that}$$$$\cot 7.5°=\sqrt{2}+\sqrt{3}+\sqrt{4}+\sqrt{6}$$ Commented by PRITHWISH SEN 2 last updated on 10/Jul/20 $$\mathrm{a}\:\mathrm{different}\:\mathrm{approach} \…

Question Number 102190 by dw last updated on 07/Jul/20 $$Findthevalueofx\cdot \cdot [TrigonometricSubs.]$$$$x-\frac{x}{\sqrt{1-x^2}}=\frac{91}{60}$$ Answered by bemath last updated on 07/Jul/20 $$\frac{{x}\left(\sqrt{\mathrm{1}−{x}^{\mathrm{2}} }−\mathrm{1}\right)}{\:\sqrt{\mathrm{1}−{x}^{\mathrm{2}} }}\:=\:\frac{\mathrm{91}}{\mathrm{60}}…

Question Number 167594 by infinityaction last updated on 20/Mar/22 Answered by som(math1967) last updated on 20/Mar/22 $$cosx+cosy+cosz=pcos(x+y+z)$$$$cosxcos(x+y+z)+cosycos(x+y+z)$$$$+coszcos(x+y+z)={pcos}^2(x+y+z)$$$$\left………{case}\:\:{i}\right) \…

Question Number 101994 by bemath last updated on 06/Jul/20 Commented by Rasheed.Sindhi last updated on 06/Jul/20 $$5\times 4^2\times 6^3\times 6^4=22394880$$ Answered by john…

Question Number 167501 by cortano1 last updated on 18/Mar/22 $$\frac{\tan {}^2\frac{\pi }{7}+\tan {}^2\frac{2\pi }{7}+\tan {}^2\frac{3\pi }{7}}{\cot {}^2\frac{\pi }{7}+\cot {}^2\frac{2\pi }{7}+\cot {}^2\frac{3\pi }{7}}=?$$ Terms of Service Privacy Policy Contact: info@tinkutara.com