Category: Trigonometry

Question Number 17119 by gourav~ last updated on 01/Jul/17 Commented by prakash jain last updated on 01/Jul/17 $$\frac{\sin (A+3B)+\sin (3A+B)}{\sin 2A+\sin 2B}$$$$=\frac{2\sin \left(\frac{4A+4B}{2}\right)\cos \left(\frac{2B-2A}{2}\right)}{2\sin (A+B)\cos (A-B)}$$$$=\frac{2\sin \left(2(A+B)\right)\cos (A-B)}{2\sin (A+B)\cos (A-B)}$$$$=\frac{\mathrm{sin}\:\left(\mathrm{2}\left({A}+{B}\right)\right)}{\mathrm{sin}\:\left({A}+{B}\right)} \…

Question Number 17100 by virus last updated on 30/Jun/17 $$\sec x\cos 5x+1=0$$$$findnumberofsolution$$ Answered by Tinkutara last updated on 01/Jul/17 $$\cos 5x+\cos x=0$$$$\mathrm{2}\:\mathrm{cos}\:\mathrm{3}{x}\:\mathrm{cos}\:\mathrm{2}{x}\:=\:\mathrm{0} \…

Question Number 17096 by Tinkutara last updated on 30/Jun/17 $$\mathrm{The}\mathrm{total}\mathrm{number}\mathrm{of}\mathrm{solutions}\mathrm{of}\mathrm{the}$$$$\mathrm{equation}$$$$\tan 3x-\tan 2x-\tan 3x\tan 2x=1\mathrm{in}$$$$[0,2\pi ]\mathrm{is}$$ Answered by sma3l2996 last updated on 30/Jun/17…

Question Number 17073 by Kunal kumar shukla last updated on 30/Jun/17 Commented by Kunal kumar shukla last updated on 30/Jun/17 $$wronganswer$$ Commented by…

Question Number 82398 by ahmadshahhimat775@gmail.com last updated on 21/Feb/20 Terms of Service Privacy Policy Contact: info@tinkutara.com