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TABLE IN TRIGONOMETRY

Angles(deg)>> 0 30 45 60 90
Sin A 0 1/2 1/SQRT 2 (SQRT 3)/2 1
Cos A 1 (SQRT 3)/2 1/SQRT 2 1/2 0
Tan A 0 1/(SQRT 3) 1 (SQRT 3) undefined
Cot A undefined (SQRT 3) 1 1/(SQRT 3) 0
Cosec A undefined 2 SQRT 2 2/(SQRT 3) 1
Sec A 1 2/(SQRT 3) SQRT 2 2 undefined

Note:

Tan A = (Sin A)/(Cos A)

Cot A = (Cos A)/(Sin A)

Cosec A = 1/(Sin A)

Sec A = 1/(Cosec A)

If we remember these and know the values of Sin and Cos A we can derive the rest