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...
The person suggests using the identity (1/2)(cos2t+1) and multiplying the integers by 3^2=9 to account for the 3t in the original equation. Another option is to use the identity cosx = (e^ix+e^-ix)/2 and expand the square to get four purely exponential terms that can be Laplace...
cosx = 0,500/3 x=80° x=80° + n360° Because (in general) . In fact the expressions for different values of higher than 1 (like and ) are important trigonometric identities. i.e. why can´t I solve question nr 1 the way I did question nr 2? In no. 2, you're just ...