Category: Trigonometry

Question Number 117606 by TANMAY PANACEA last updated on 12/Oct/20 $$find$$$$sina+sin(a+b)+sin(a+2b)++..+sin\{a+(n-1)b\}$$ Answered by Dwaipayan Shikari last updated on 12/Oct/20 $$\frac{\mathrm{1}}{\mathrm{2}{sin}\frac{{b}}{\mathrm{2}}}\left(\mathrm{2}{sinasin}\frac{{b}}{\mathrm{2}}+\mathrm{2}{sin}\left({a}+{b}\right){sin}\frac{{b}}{\mathrm{2}}+…..\mathrm{2}{sin}\left({a}+\left({n}−\mathrm{1}\right){b}\right){sin}\frac{{b}}{\mathrm{2}}\right) \…

Question Number 183068 by cortano1 last updated on 19/Dec/22 Terms of Service Privacy Policy Contact: info@tinkutara.com

Question Number 182848 by malithxd last updated on 15/Dec/22 $$\frac{{sin}^{3}x-sinx+cosx}{sinx}=cotx-{cos}^{2}x$$$$provethis$$$$$$$$$$ Answered by Rasheed.Sindhi last updated…

Question Number 117259 by bemath last updated on 10/Oct/20 Answered by Dwaipayan Shikari last updated on 10/Oct/20 $$tan\alpha +tan\beta =3$$$$tan\alpha tan\beta =-3$$$$tan(\alpha +\beta )=\frac{tan\alpha +tan\beta }{1-tan\alpha tan\beta }=\frac{3}{4}$$$${sin}\left(\alpha+\beta\right)=\frac{\mathrm{3}}{\mathrm{5}}\:,{cos}\left(\alpha+\beta\right)=\frac{\mathrm{4}}{\mathrm{5}} \…

Question Number 117255 by bobhans last updated on 10/Oct/20 Terms of Service Privacy Policy Contact: info@tinkutara.com