all trignometric ratios class 10
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and also identities
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SinA = OPP/HYP
CosA = ADJ/HYP
TanA = OPP/ADJ
CotA =ADJ/APP
CosecA = HYP/OPP
SecA = HYP/ADJ
Sin2A + Cos2A = 1
Tan2A + 1 = Sec2A
Cot2A + 1 = Cosec2A
TanA = SinA / CosA
. CotA = CosA / SinA
CosecA = 1 / SinA
SecA = 1 / CosA
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