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trigonometry Cheat Sheet by

informative

TRIGON­OMERTIC RATIOS

Sinθ= opp/hyp
Cosθ= adj/hyp
Tanθ= opp/adj
Cosecθ= hyp/opp
Secθ= hyp/adj
Cotθ= adj/opp
SOH CAH TOA
 

TRIGON­OMETRIC IDENTITIES

Sin²θ+­Cos²θ= 1
Sec²θ=­1+Tan²θ
Cosec²­θ=1­+Cot²θ
Memo­rise
 

TRIGON­OMETRIC VALUES

Memorise. very import­ant
 

COMPLE­MENTARY ANGLES

Sin(90­°-θ­)=Cosθ
Cos(90­°-θ­)=Sinθ
Cosec(­90°­-θ)­=Secθ
Sec(90­°-θ­)=C­osecθ
Tan(90­°-θ­)=Cotθ
Cot(90­°-θ­)=Tanθ
                   
 

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