## Trigonometric chart of cos30 and cos 60 deg

**To remember the values of above table you can as follows:**

(i) divide the numbers 0, 1, 2, 3 and 4 by 4,

(ii) take the positive square roots of all above numbers,

(iii) All above numbers will give us the values of sin 0°, sin 30°, sin 45°, sin 60° and sin 90° respectively.

**The Trigonometry angle 0° or 0 degrees**

The sine of angle 0° or sin 0 degrees

sin 0° = √(0/4) = 0

The cos(Cosine) of angle 0° or cos 0 degrees

cos 0° = √(4/4) = 1

The tan(Tangent) of 0° or tan 0 degrees

tan 0° = 0

The cosec(cosecant) of angle 0° or cosec 0 degrees

cosec 0° = undefined

The sec(secant) of angles 0° or sec 0 degrees

sec 0° = 1

The cot(cotangent) angles 0° or cot 0 degrees

cot 0° = undefined

**The Trigonometry angle 30° or 30 degrees**

The sine of angle 30° or sin 30 degrees

sin 30° = √(1/4) = ½

The cos(Cosine) of angle 30° or cos 30 degrees

cos 30° = √(3/4) = √3/2

The tan(Tangent) of 30° tan 30 degrees

tan 30° = √3/3

The cot(cotangent) angles 30° or cot 30 degrees

cot 30° = √3

The sec(secant) of angles 30° or sec 30 degrees

sec 30° = 2√3/3

The cosec(cosecant) of angle 30° or cosec 30 degrees

cosec 30° = 2

**The Trigonometry angle 45° or 45 degrees**

The sine of angle 45° or sin 45 degrees

sin 45° = √(2/4) = 1/√2 = √2/2

The cos(Cosine) of angle 45° or cos 45 degrees

cos 45° = √(2/4) = 1/√2 = √2/2

The tan(Tangent) of 45° tan 45 degrees

tan 45° = 1

The cot(cotangent) angles 45° or cot 45 degrees

cot 45° = 1

The sec(secant) of angles 45° or sec 45 degrees

sec 45° = √2

The cosec(cosecant) of angle 45° or cosec 45 degrees

cosec 45° = √2

**The Trigonometry angle 60° or 60 degrees**

The sine of angle 60° or sin 60 degrees

sin 60° = √3/4 = √3/2;

The cos(Cosine) of angle 60° or cos 60 degrees

cos 60° = √(1/4) = 1/2

The tan(Tangent) of 60° tan 60 degrees

tan 60° = √3

The cot(cotangent) angles 60° or cot 60 degrees

cot 60° = √3/3

The sec(secant) of angles 60° or sec 60 degrees

sec 60° = 2

The cosec(cosecant) of angle 0° or cosec 60 degrees

cosec 60° = 2√3/3

**The Trigonometry angle 90° or 90 degrees**

The sine of angle 90° or sin 90 degrees

sin 90° = √(4/4) = 1

The cos(Cosine) of angle 90° or cos 90 degrees

cos 90° = √(0/4) = 0

The tan(Tangent) of 90° tan 90 degrees

tan 90° = undefined

The cot(cotangent) angles 90° or cot 90 degrees

cot 90° = 0

The sec(secant) of angles 90° or sec 0 degrees

sec 90° = undefined

The cosec(cosecant) of angle 90° or cosec 90 degrees

cosec 90° = 1

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