[size=150]Hi well I am doing my maths homework and the question was "Solve these equations, correct to 0.1 for 0<x<360 5(a) 4sinx+1=0 and then i got a fraction which was -1/4", now my teacher always says "solve for the positive" but could I turn the top half of this fraction be turned into a positive? [/size]
Guest Feb 2, 2012
sin x = - 1/4, x=(-1)^n arcsin (-1\4) + \pi n = (-1)^{n+1} arcsin 1/4


subtract from 360 an absolute value of this angle and you get a positive number (I guess you're aware that "- angle" means way clockwise from the 0 grades point on the 360 grades circle) that is identical to the found root of the equation.
scrutinizer  Aug 26, 2013

5 Online Users


New Privacy Policy

We use cookies to personalise content and advertisements and to analyse access to our website. Furthermore, our partners for online advertising receive information about your use of our website.
For more information: our cookie policy and privacy policy.