Table of trigonometry
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Sin 0=0,sin 30=1/2,sin45=1/√2,sin60=√3/2,sin90 =1.cos0=1,cos30=√3/2,cos45=1/√2,cos 60=1/2,cos90=0.Tan0=0,tan30=1/√3,tan45=1,tan60=√3,tan90=not define. cosec0=notdefine,cosec30=2,cosec45=√2,cosec60=2/√3,cosec90=1.sec0=1,sec30=2/√3,sec45=√2,sec60=2,sec90=not define.cot0=not define,cot30=√3,cot45=1,cot60=1/√3,cot90=0.
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Given in NCERT textbook