Recent content by tumelo

Can somebody explain to me why we have to square the variances when calculating the deviation and then finding the square root(whc is suppose to reverse the squaring) ,it doesn't make sense to me

Some books will mention that dy/dx is a symbol some say its a fraction,wht the truth? please help

thank u very much for tht infomation,hope to get more from u on other topics!

Tiny-tim Ohhhh my bad sorry bout tht,anyway let's drop it i found some material tht will help me understand the origins of trigonometric funcions,thanks for the replies though,hope to communicate wit hu on another topic, i am doing a big project this side

hey tiny-tim,i have an attached document tht u shud check it out and explain to me using sine for the angle α

wow! thanks Tiny-Tim,i think now i am getting somewhere first let me say tht i was wrong by using the "multiply" word i just wanted to emphasise the fact tht sine does "SOMETHING" to the angle to give a NUMBER(not an angle) which will be equal to the right hand side if we take an example of...

thnks for the reply. lets have a look at this equatio sin x=opp/hypo the right side of the equation are numbers(opposite and hypotinuse) which is okay,now the problem is the left side,it means tht the function(if i may call it tht) sine multiplied by a given angle to give a number...

Okay that I understand,wht I really wanted to say was what are Sine,Cosine and Tan,what do they really mean,because if I take example Sine 180(deg)=0,wht did Sine do o make 180(deg) zero?

can someone please help with the General Angle ratios,i don't understand the division into 4 quadrants,I would like someone to expain in detail