ABC-with-AB-5-BC-7-CA-8-Find-the-value-of-sin-A-sin-B-sin-C-cot-A-2-cot-B-2-cot-C-2- Tinku Tara June 3, 2023 Trigonometry 0 Comments FacebookTweetPin Question Number 10363 by Joel575 last updated on 05/Feb/17 ΔABCwithAB=5,BC=7,CA=8Findthevalueof(sinA+sinB+sinC).(cotA2+cotB2+cotC2) Answered by mrW1 last updated on 06/Feb/17 a=BC=7b=AC=8c=AB=5s=a+b+c2=7+8+52=10t=s(s−a)(s−b)(s−c)=10×3×2×5=103sinA=2tbc=2×1038×5=32cosA=1−34=12sinB=2tac=2×1037×5=437cosB=1−4849=17sinC=2tba=2×1038×7=5314cosC=1−75196=1114cotA2=1+cosAsinA=1+1232=33cotB2=1+cosBsinB=1+17437=23cotC2=1+cosCsinC=1+11145314=53(sinA+sinB+sinC)(cotA2+cotB2+cotC2)=(32+437+5314)(33+23+53)=20314×103=1007 Commented by Joel575 last updated on 06/Feb/17 thankyousir Terms of Service Privacy Policy Contact: info@tinkutara.com FacebookTweetPin Post navigation Previous Previous post: An-helium-atom-has-a-mass-of-6-64-10-27-kg-and-a-charge-Q-is-2-electon-Compare-the-magnitude-of-the-electric-repulsion-to-that-of-the-gravitational-attraction-between-them-Next Next post: Question-75902 Leave a Reply Cancel replyYour email address will not be published.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.