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Given sin theta = (3)/(5). Find all the ...

Given `sin theta = (3)/(5)`. Find all the other T-ratio , if `theta` lies in the first quadrant.

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Let sum be `S_(n)` then `S_(n)=1+2+3+…. +n, S_(n)=n/2[1+n]=[(n(n+1))/2]`
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