Login

Plz explain??

Dear student

W e h a v e, r_{1} r_{2} \{(\cos θ_{1} + i \sin θ_{1}) (\cos θ_{2} + i \sin θ_{2})\} = r_{1} r_{2} \{\cos θ_{1} \cos θ_{2} + i \cos θ_{1} \sin θ_{2} + i \sin θ_{1} \cos θ_{2} + i^{2} \sin θ_{1} s i n θ_{2}\} = r_{1} r_{2} \{\cos θ_{1} \cos θ_{2} + i^{2} s i n θ_{1} s i n θ_{2} + i c o s θ_{1} s i n θ_{2} + i s i n θ_{1} c o s θ_{2}\} [∵ i^{2} = - 1] = r_{1} r_{2} \{\cos θ_{1} \cos θ_{2} - \sin θ_{1} \sin θ_{2} + i (\sin θ_{1} \cos θ_{2} + \cos θ_{1} \sin θ_{2})\} = r_{1} r_{2document.write('This conversation is already closed by Expert');document.write('Was this answer helpful?'); 0View Full Answervar global={
        "maindomain":'https://www.meritnation.com/',
        "purchaseUrl":'https://www.meritnation.com/products/purchase',
        "GOOGLE_ANALYTIC_CODE" :true,
        "GA_ACCOUNT_ID" : 'UA-6131270-3',
        "GA_ACCOUNT_DOMAIN" : '.meritnation.com',
        "GOOGLE_TAG_MANAGER" : '1',
    }; var supportContactInfo = {"paid":{"phone":"8800410522","email":"care@meritnation.com"},"free":{"phone":"","email":"help@meritnation.com "}} About Us Blog Terms & Conditions Our Results Copyright © 2024 Aakash EduTech Pvt. Ltd. All rights reserved. Aakash EduTech Pvt. Ltd. if(!global.GOOGLE_ANALYTIC_CODE)
    function ga(){}
(function() {
    if(!global.GOOGLE_ANALYTIC_CODE){
        return;
    }
    (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
        (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
        m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
    })(window,document,'script','//www.google-analytics.com/analytics.js', 'ga');
})(); var MN_JS_VERSION = "1525032022";
var google_analytic_code_included = 0;var userId=0;    var currId=0;    var gradeId=0;	var currTheme=1;
readyLoad(function(){
    var mncid=get_mncid('mncid');window.googleAnalyticMncId = mncid;var campTrackingFlag = 1;})


function trackGaEvent(gaCategory,gaAction,gaLabel) {
            if(arguments.length==5){ga('send', 'event', gaCategory, gaAction, gaLabel, arguments[3]);}
        else if(arguments.length==4){ga('send', 'event', gaCategory, gaAction, gaLabel, arguments[3]);}
        else{ga('send', 'event', gaCategory, gaAction, gaLabel);}
    } if(!dataLayer) {
        var dataLayer = [];
    }
    // -- Google Tag Manager
    (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':
    new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],
    j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src=
    'https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);
    })(window,document,'script','dataLayer','GTM-KJ7TBN9');
    // -- End Google Tag Manager

    //Add GOOGLE TAG MANAGER Custom events/triggers here <iframe src="https://www.googletagmanager.com/ns.html?id=GTM-KJ7TBN9"
height="0" width="0" style="display:none;visibility:hidden"></iframe>What are you looking for?}