Trigonometric ratios

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Some=People/Have, Curly=Brown/Hair, Tightly=Pulled/Back

Sin = p/h, cos = b/h, tan = p/b

It is the easiest way of keeping the formula in the mind.
N.B: Write it sin theta, cos theta, tan theta

RECIPROCAL OF MAIN FORMULAE
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COSEC=H/P (reciprocal of SIN)
SEC=H/B (reciprocal of COS)
COT=B/P (reciprocal of TAN)