Re: Prove the trig identity cosx/(secx+tanx)= 1-sinx Murray 30 Dec 2015, 03:12 When you see a mix of trigonometric ratios, try converting everything to just sin, cos and/or tan.Re: Prove the trig identity cosx/(secx+tanx)= 1-sinx Alexandra 31 Dec 2015, 04:08 LHS=cos...
4sinx=3 sinx=3/4 x= ca. 49° x=49° + n360° or 131+ n360°. Now I´m wondering why I can´t solve question nr 1) in the following way: cosx = 0,500/3 x=80° x=80° + n360° Because (in general) . In fact the expressions for different values of higher than ...