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We are given a conical pendulum with : V - tan. speed of particle

m - mass of rotating particle

g - gravity acceleration

L - leght of the string

We need to find CosA , T by what is given above !!!

A- is the angle between the string and vertical line !!!!

So : I wrote : tcosA=mg

tsinA=mv^2/R

R=LsinA

but I can't present cosA without sinA or something

Please Help !