please answer the ques. (no spamming plzzzz)
Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
vector A+ vector B= vector C
therefore
A²+B²+2ABsin x= C².............(I)
now, if B is reversed it means now it is
-B in place of B
so vector A +(- vector B)=vector D
so, A²+B²-2AB sin x=D²..............(II)
adding (I) & (II) we get,
X²+D²=2(A²+B²)