Category: Trigonometry

Question Number 175585 by mnjuly1970 last updated on 03/Sep/22 $$$$$$inA\stackrel{\mathrm{\Delta }}{BC}provethat:$$$$$$$$sin\left(\frac{A}{2}\right)⩽\frac{a}{b+c}\mathrm{<img\; draggable="false"\; role="img"\; class="emoji"\; alt="◼"\; src="https://s.w.org/images/core/emoji/15.1.0/svg/25fc.svg">}$$$$$$ Commented by mahdipoor last…

Question Number 44478 by peter frank last updated on 29/Sep/18 $$provethat{2\tan }^{-1}\left(\sqrt{\frac{a-b}{a+b}}\tan \frac{\theta }{2}\right)={\cos }^{-1}\left(\frac{b+acos\theta }{a+bcos\theta }\right)$$ Answered by tanmay.chaudhury50@gmail.com last updated on 29/Sep/18 $$RHS$$$${cos}^{−\mathrm{1}}…

Question Number 175493 by ajfour last updated on 31/Aug/22 $${\tan }^{-1}\left(a\sin \theta \right)={\sin }^{-1}b-\theta$$$$find\theta .$$ Commented by Frix last updated on 01/Sep/22 $$\mathrm{I}\:\mathrm{tried}\:\mathrm{but}\:\mathrm{it}\:\mathrm{leads}\:\mathrm{to}\:\mathrm{a}\:\mathrm{4th}\:\mathrm{degree}\:\mathrm{polynome} \…

Question Number 109946 by mnjuly1970 last updated on 26/Aug/20 Terms of Service Privacy Policy Contact: info@tinkutara.com

Question Number 109910 by bemath last updated on 26/Aug/20 Commented by qwerty111 last updated on 26/Aug/20 Commented by qwerty111 last updated on 26/Aug/20 $$\boldsymbol{{Shuni}}\:\:\boldsymbol{{soddalashtirib}}\:\:\boldsymbol{{qo}}'\boldsymbol{{ying}}\:\:\boldsymbol{{chiqadi}}.\boldsymbol{{Siz}}\:\:\boldsymbol{{o}}'\boldsymbol{{zbekmisiz}}\:? \…