Category: Trigonometry

Question Number 11301 by tawa last updated on 19/Mar/17 $$\mathrm{ABCD}\mathrm{is}\mathrm{a}\mathrm{cyclic}\mathrm{quad}\mathrm{and}\mathrm{the}\mathrm{diagonal}\mathrm{AC}\mathrm{and}\mathrm{BD}\mathrm{intersect}\mathrm{at}\mathrm{H}.$$$$△\mathrm{DAC}=41°\mathrm{and}△\mathrm{AHB}=70°.\mathrm{calulate}△\mathrm{ACB}$$ Commented by sandy_suhendra last updated on 20/Mar/17 $$\mathrm{do}\mathrm{you}\mathrm{mean}\mathrm{\angle }\mathrm{DAC},\mathrm{\angle }\mathrm{AHB}\mathrm{and}\mathrm{\angle }\mathrm{ACB}?$$ Answered…

Question Number 76791 by john santu last updated on 30/Dec/19 $$calculate\frac{sin{44}^o+sin{66}^o+sin{70}^o}{cos{22}^o\times cos{33}^o\times cos{35}^o}.$$ Terms of Service Privacy Policy Contact:…

Question Number 142167 by iloveisrael last updated on 27/May/21 $$Findmax\mathrm{\&}minoffunction$$$$f\left(x\right)=4\tan x+3\cot x$$ Answered by MJS_new last updated on 27/May/21 $$-\mathrm{\infty }<\tan x<+\mathrm{\infty }\Rightarrow \mathrm{no}\mathrm{absolute}\min ,\max$$$${g}\left({t}\right)=\mathrm{4}{t}+\frac{\mathrm{3}}{{t}} \…

Question Number 10955 by Joel576 last updated on 04/Mar/17 $$\mathrm{If}\frac{\cos \theta }{1-\sin \theta }=aa\ne \frac{\pi }{2}+2k\pi$$$$\mathrm{So},\tan \frac{\theta }{2}=\dots$$$$\left(\mathrm{A}\right)\frac{a}{a+1}\left(\mathrm{D}\right)\frac{a+1}{a-1}$$$$\left(\mathrm{B}\right)\frac{1}{a+1}\left(\mathrm{E}\right)\frac{a}{a-1}$$$$\left(\mathrm{C}\right)\frac{a-1}{a+1}$$ Answered by ajfour last updated…

Question Number 10947 by rish@bh last updated on 03/Mar/17 $$\mathrm{In}\mathrm{a}\mathrm{triangle}\mathrm{ABC}\mathrm{prove}\mathrm{the}\mathrm{following}$$$$\frac{{(a+b+c)}^2}{a^2+b^2+c^2}=\frac{\cot \frac{A}{2}+\cot \frac{B}{2}+\cot \frac{C}{2}}{\cot A+\cot B+\cot C}$$ Terms of Service Privacy Policy Contact: info@tinkutara.com