Category: Trigonometry

Question Number 137771 by bemath last updated on 06/Apr/21 Commented by bemath last updated on 06/Apr/21 $$anyonesolvethequestionnumber$$$$16?$$ Commented by Ñï= last…

Question Number 6602 by cindycastro last updated on 05/Jul/16 $$\mathrm{\%}ml$$ Commented by Temp last updated on 05/Jul/16 $$=\frac{ml}{100}$$ Terms of Service…

Question Number 71918 by lalitchand last updated on 22/Oct/19 $$\mathrm{If}\mathrm{Cos}\theta =\frac{\mathrm{x}\cos \beta -\mathrm{y}}{\mathrm{x}-\mathrm{y}\cos \beta }\mathrm{then}\mathrm{prove}\mathrm{that},\tan \frac{\theta }{2}=\sqrt{\frac{\mathrm{x}-\mathrm{y}}{\mathrm{x}+\mathrm{y}}}\tan \frac{\beta }{2}$$ Commented by Prithwish sen last updated on 22/Oct/19 $$\mathrm{Using}\mathrm{componendo}\mathrm{dividendo}$$$$\frac{1-\cos \theta }{1+\cos \theta }=\frac{(1-\cos \beta )(\mathrm{x}+\mathrm{y})}{(1+\cos \beta )(\mathrm{x}-\mathrm{y})}$$$$\boldsymbol{\mathrm{tan}}\frac{\boldsymbol{\theta}}{\mathrm{2}}\:=\:\sqrt{\frac{\boldsymbol{\mathrm{x}}+\boldsymbol{\mathrm{y}}}{\boldsymbol{\mathrm{x}}−\boldsymbol{\mathrm{y}}}}\:\boldsymbol{\mathrm{tan}}\frac{\boldsymbol{\beta}}{\mathrm{2}}…

Question Number 6316 by sanusihammed last updated on 23/Jun/16 $$Howmanyidempotentmatricescanbeformedfroma$$$$diagonalmatrixAwiththeelements$$$$a(i,i)fori=\{1,2,3,\dots \dots .n\}$$ Answered by nburiburu last updated on 23/Jun/16 $$\:{in}\:\mathbb{R}^{{n}×{n}} :\:…

Question Number 137366 by liberty last updated on 02/Apr/21 $$Findthesolutionofequation$$$$\sin {}^{2}x+\sin {}^{2}2x+\sin {}^{2}3x=1$$$$oninterval(0,2\pi )$$ Answered by benjo_mathlover last updated on…