Trigonometry: Tricks

Trigonometric Ratios ( SOH- CAH- TOA)

Sine =  Opposite / Hypotenuse 

Cos = Adjacent / Hypotenuse

Tan = Opposite / Adjacent

Reciprocals:

Cosec = 1/sine

Sec = 1/ cos

 

Cot = 1/tan

Trigonometric Angle Values

For simple way to remember these values Click here.. 

Signs of Angles in Quadrants

Easy method to remember this

• All three of them are positive in Quadrant I
• Sine only is positive in Quadrant II
• Tangent only is positive in Quadrant III
• Cosine only is positive in Quadrant IV

Trigonometrical Ratios of

 (90° ±θ), (180±θ),(270±θ),(360±θ)

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