Category: Trigonometry

Question Number 27851 by v7277668420 last updated on 15/Jan/18 Commented by bmind4860 last updated on 15/Jan/18 $$useidentity{a}^3+b^3=(a+b)(a^2+b^2-ab)$$ Commented by…

Question Number 27844 by bmind4860 last updated on 15/Jan/18 $$For\alpha ϵR,cos\alpha cosx+siny⩾sinx,then$$$$findthesumofthepossiblevaluesof$$$$sin\alpha +siny.$$ Commented by bmind4860 last updated on 16/Jan/18 $${please}\:{help} \…

Question Number 27840 by bmind4860 last updated on 15/Jan/18 $$Ifxcos\theta =ycos(\theta +\frac{2\pi }{3})=zcos(\theta +\frac{4\pi }{3}),then$$$$thevalueofxy+yz+zx.$$ Answered by ajfour last updated on 15/Jan/18 $$letx\cos \theta =y\cos (\theta +\frac{2\pi }{3})$$$$\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:={z}\mathrm{cos}\:\left(\theta+\frac{\mathrm{4}\pi}{\mathrm{3}}\right)={r}\: \…

Question Number 27820 by bmind4860 last updated on 15/Jan/18 $$IfA,Bϵ(0,\frac{\pi }{2})suchthat3{sin}^{2}A+2{sin}^{2}B=1$$$$and3sin2A-2sin2B=0,findthevalueofA+B.$$ Answered by ajfour last updated on 15/Jan/18 $$\frac{\mathrm{3}}{\mathrm{2}}\left(\mathrm{1}−\mathrm{cos}\:\mathrm{2}{A}\right)+\mathrm{1}−\mathrm{cos}\:\mathrm{2}{B}=\mathrm{1} \…

Question Number 27706 by shivamgiri last updated on 13/Jan/18 $$thenumberofxϵ[0,2\pi ]forwhich\mid \sqrt{}2{sin}^{4}x+18{cos}^{2}x-\sqrt{2{cos}^{4}x+18{sin}^{2}x}\mid =1$$ Terms of Service Privacy Policy Contact: info@tinkutara.com