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According to me you should only learn the values for sin , cos and tan as rest are the ooposite values...... And learn p/h= sin, b/h= cos and p/b= tan......Simply----------> PBP/ HHB.... You can learn it by ---- Pandit Bhadri Prasad, Har Har Bole, Sona Chandi Tole ( Sona-sin.......Chandi- Cos and Tole-Tan )
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