If-cot-x-tan-x-4-then-cot-2-2-sin-2x-tan-2-x- Tinku Tara June 16, 2023 Trigonometry 0 Comments FacebookTweetPin Question Number 193533 by horsebrand11 last updated on 16/Jun/23 Ifcotx−tanx=4thencot2+2sin2x−tan2x=? Answered by MM42 last updated on 16/Jun/23 1−tan2x=4tanx⇒tan2x+4tanx−1=0tanx=−2±5A=1tan2x+1+tan2xtanx−tan2x Answered by Rajpurohith last updated on 19/Jun/23 saya=tanxandb=cotx⇒ab=1givenb−a=4⇒(b+a)2−(b−a)2=4ab=4⇒(b+a)2−16=4⇒b+a=25⇒2b=4+25⇒b=cotx=2+5⇒a=tanx=−2+5⇒cot2x−tan2x=(b+a)(b−a)=25.4=85sosin2x=2a1+a2=25−41+4+5−45=2(5−2)10−45=2(5−2)25(5−2)=15⇒thevalueofgivenexpressionis(2+5)2+25−(−2+5)2=25+(25)(4)=105 Terms of Service Privacy Policy Contact: info@tinkutara.com FacebookTweetPin Post navigation Previous Previous post: Question-193563Next Next post: Question-193565 Leave a Reply Cancel replyYour email address will not be published. Required fields are marked *Comment * Name * Save my name, email, and website in this browser for the next time I comment.