What is the exact value of cos 105?

-0.2588
The value of cos 105° is equal to the x-coordinate (-0.2588). ∴ cos 105° = -0.2588.

What is the exact value of sin 105 cos 15?

sin(105)=cos(15)=√2+√32.

What is exact value of sin?

The exact value of sin(0) is 0 .

What is the exact value of sin 345 )?

Sin 345 degrees is the value of sine trigonometric function for an angle equal to 345 degrees. The value of sin 345° is -(√6 – √2)/4 or -0.2588 (approx).

How do you find the value of tan15?

Value of Tan 15

  1. Tan (15°) can be found if we know the value of sin 15 degrees and cos 15 degrees.
  2. From the above table, we have the values of tan, sin and cos ratios for 0°, 30°, 45°, 60° and 90°.
  3. tan (15°) = √3 – 1/ √3 + 1.
  4. Hence, the value of tan (15°) is √3 – 1/√3 + 1.
  5. ∴ Tan (15°) = (1.732 – 1)/(1.732 + 1) = 0.2679.

What is the exact value of cos7pi 12?

-0.2588190
The value of cos 7pi/12 is -0.2588190. . .. Cos 7pi/12 radians in degrees is written as cos ((7π/12) × 180°/π), i.e., cos (105°).

Whats an exact value?

Definition. Exact value is where you cannot estimate the value you must be precise, eg; you can’t estimate something as being around about 5 centimetres; no you need an exact value such as 5.62. Exact value. Return to Mathematics Home.

What does cos0 mean?

The value of cos 0 is 1. Here, we will discuss the value for cos 0 degrees and how the values are derived using the quadrants of a unit circle. The trigonometric functions are also known as an angle function that relates the angles of a triangle to the length of the triangle sides.

What is the exact value of cos 195?

-0.9659258.
The value of cos 195 degrees is -0.9659258. . .. Cos 195 degrees in radians is written as cos (195° × π/180°), i.e., cos (13π/12) or cos (3.403392. . .).

What is the value of tan45?

1
Tan 45 degrees is the value of tangent trigonometric function for an angle equal to 45 degrees. The value of tan 45° is 1.

How do you find the exact value of sin?

First divide the numbers 0,1,2,3,and 4 by 4 and then take the positive roots of all those numbers.

  • Hence,we get the values for sine ratios,i.e.,,½,1/√2,√3/2,and 1 for angles 0°,30°,45°,60° and 90°
  • Now,write the values of sine degrees in reverse order to get the values of cosine for the same angles.

    • What is the LCM of 15 and 105?

    To find the least common multiple of two numbers just type them in and get the solution. To get the Least Common Multiple (LCM) of 105 and 15 we need to factor each value first and then we choose all the factors which appear in any column and multiply them: 105: 3. 5.

    How to find the exact value?

    How to find the exact trigonometric values: sin, cos, tan? Draw the angle, look for the reference angle. Use special triangles or the unit circle. Check the quadrant to determine the sign (+ or -). Trigonometry – Solving exact values of sin, cos, tan. Calculating exact values of sin, cos, tan without a calculator.

    What is the exact value of Cos 105 degrees?

    The value of cot 105 degrees can be calculated by constructing an angle of 105° with the x-axis, and then finding the coordinates of the corresponding point (-0.2588, 0.9659) on the unit circle. The value of cot 105° is equal to the x-coordinate(-0.2588) divided by the y-coordinate (0.9659). ∴ cot 105° = -0.2679