How do you find COS 330 without a calculator?

For cos 330 degrees, the angle 330° lies between 270° and 360° (Fourth Quadrant). Since cosine function is positive in the fourth quadrant, thus cos 330° value = √3/2 or 0.8660254. . .

How do you find sin 240 without a calculator?

For sin 240 degrees, the angle 240° lies between 180° and 270° (Third Quadrant). Since sine function is negative in the third quadrant, thus sin 240° value = -(√3/2) or -0.8660254. . .

Is it possible to do trigonometry without a calculator?

Evaluating Trigonometric Functions without a Calculator For trigonometric functions of Graphical Axes, you can easily solve the problems using the easy-to-remember patterns for 0°, 90°, 180°, and 270°. The values of Sine and Cosine for these angles are quite easy to be saved in your memory.

How do you find sin 300 without a calculator?

For sin 300 degrees, the angle 300° lies between 270° and 360° (Fourth Quadrant). Since sine function is negative in the fourth quadrant, thus sin 300° value = -(√3/2) or -0.8660254. . .

How do you find sin 270 without a calculator?

We can use trigonometric identities to represent sin 270° as,

1. sin(180° – 270°) = sin(-90°)
2. -sin(180° + 270°) = -sin 450°
3. cos(90° – 270°) = cos(-180°)
4. -cos(90° + 270°) = -cos 360°

How do you find the sin Cos tan of 270?

If this is the case, then at 90 degrees, we will intersect the unit circle at the point (0,1), and at 270 degrees we will be at (0,−1) . Given that, we can easily find the sine and cosine: sin(270o)=−1,cos(270o)=0,tan(270o)=−10= undefined.

How do you solve sin 270 without a calculator?

How do you find tan 300 without a calculator?

Tan 300 Degrees Using Unit Circle

1. Rotate ‘r’ anticlockwise to form 300° angle with the positive x-axis.
2. The tan of 300 degrees equals the y-coordinate(-0.866) divided by x-coordinate(0.5) of the point of intersection (0.5, -0.866) of unit circle and r.