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For the one triangle BXC :guys i need help with question #9(b) on this paper...........
please help!!!!!!!!!!!!!!!!!!!!![]()
Then B or also A BTW why ru giving againIf I got 35 in stats than? xD
R=180-(P+Q) cos(R)=cos(180-(P+Q))= - cos( P+Q) (from identity cosx=-cos(180-x)) now simply find -cos(P+Q) by using the formula cos(A+B)=cosAcosB-sinAsinBguys i need your help.....
P,Q and R are the angles of a triangle such that cosP=3/5 and cosQ=5/13
Without using a calculator find the value of cosR [2]
are u sure the question is right ?I got another question......
the variable complex number z is given by
z=2cosA+i(1-sinA) whre A takes all values in the interval -pi<A<pi
prove that the real part of 1/(z+2-i) is constant for -pi<A<pi ............
1/4?I got another question......
the variable complex number z is given by
z=2cosA+i(1-sinA) whre A takes all values in the interval -pi<A<pi
prove that the real part of 1/(z+2-i) is constant for -pi<A<pi ............
substitute any value when x<-7 we get a positive value which is not the solution (>0)View attachment 60930
okay I understand until we reach the critical values x =1 and x =-7 but I don't get this next part, the line method to get real roots. How do we use it?
They have used that to show the points satisfying in that region. The same is explained by :View attachment 60930
okay I understand until we reach the critical values x =1 and x =-7 but I don't get this next part, the line method to get real roots. How do we use it?
substitute any value when x<-7 we get a positive value which is not the solution (>0)
substitute any value when x>1 we get a positive value which is not the solution (>0)
sustitute values when -7<x<1 we get a negative value which is the solution....[<0]
They have used that to show the points satisfying in that region. The same is explained by :
The easy way to remember this thing is :
if any inequality with < 0
then the roots will be sth like : less positive/ more negative value < x < more positive/ less negative value
if with > o
then, x > more positive/ less negative value and x < less positive/ more negative value
lets take ur example : x = 1 and x = -7 and inquality < 0
thius the answer will be -7 < x < 1![]()
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You already know one line is y = xneed help with ques #7(b)
ARE U SURE I WILL GET AN A?Yep that's an A for sure
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