- What is the formula for sine?
- What is the value of sin 4 pi by 3?
- What is a secret calculator?
- How do you calculate work?
- What mode should my calculator be in?
- How do you solve cos 75?
- How do you find sin 35 without a calculator?
- How do you find sin 120 without a calculator?
- How do you figure out angles?
- How do Calculators Calculate?
- What does SD mean on calculator?
- Why Sine is called sine?
- What mode should my calculator be in for sin and cos?
- Should I use RAD or DEG?
- Who invented calculator?

## What is the formula for sine?

In any right triangle, the sine of an angle x is the length of the opposite side (O) divided by the length of the hypotenuse (H).

In a formula, it is written as ‘sin’ without the ‘e’: Often remembered as “SOH” – meaning Sine is Opposite over Hypotenuse..

## What is the value of sin 4 pi by 3?

Trigonometry Examples Apply the reference angle by finding the angle with equivalent trig values in the first quadrant. Make the expression negative because sine is negative in the third quadrant. The exact value of sin(π3) sin ( π 3 ) is √32 .

## What is a secret calculator?

The Secret Calculator App looks like an innocent calculator app on your child’s Iphone or Android device. Actually, this app is used to hide files, photos and videos. … This app is popular because it helps anyone to hide images, sexting photos, and files in a folder that can never be found.

## How do you calculate work?

Work can be calculated with the equation: Work = Force × Distance. The SI unit for work is the joule (J), or Newton • meter (N • m). One joule equals the amount of work that is done when 1 N of force moves an object over a distance of 1 m.

## What mode should my calculator be in?

Almost all calculators come with both DEG & RAD mode. You should use the mode which matches with the given data in the question. For example: if we need to find cos(v) and v=60°, then use degree mode because given angle is in degree. If the given angle is in radians then use RAD mode.

## How do you solve cos 75?

Answer and Explanation: The value of cos(75°) is √6−√24 6 − 2 4 . Notice that we can write 75° as 30° + 45°.

## How do you find sin 35 without a calculator?

sin 35° = sin 30° cos 5° + sin 5° cos 30° = (1/2) cos 5° + sin 5° (√3/2). sin 35° ≈ 1/2 + (π/36) (√3/2).

## How do you find sin 120 without a calculator?

Use the unit circle and the fact that on the unit circle, sin A = y, and cos A = x. By drawing the unit circle it should be clear that sin(120) = sin(60) . If you know that sin(60) = sqrt(3)/2, then sin(120) = sqrt(3)/2. Originally Answered: How do you find sin 120 without a calculator?

## How do you figure out angles?

Find the angle of elevation of the plane from point A on the ground.Step 1 The two sides we know are Opposite (300) and Adjacent (400).Step 2 SOHCAHTOA tells us we must use Tangent.Step 3 Calculate Opposite/Adjacent = 300/400 = 0.75.Step 4 Find the angle from your calculator using tan-1

## How do Calculators Calculate?

Calculators (and computers) combine inputs using electronic components called logic gates. … Together, the logic gates enable circuits to add, subtract, multiply and divide the numbers sent to them by transistors. Take the AND gate: If both the signals that arrive at the gate are 1s, then AND sends out a 1.

## What does SD mean on calculator?

Standard deviationRelated Probability Calculator Sample Size Calculator Statistics Calculator. Standard deviation in statistics, typically denoted by σ, is a measure of variation or dispersion (refers to a distribution’s extent of stretching or squeezing) between values in a set of data.

## Why Sine is called sine?

The word sine comes from the Latin sinus, bosom, because early translators mistook the Arabic word for chord and thought it was the Arabic word for bosom. The “co-” prefix in cosine and cotangent simply stands for co-angle, the complementary angle. The cosine of an angle is the sine of its complementary angle.

## What mode should my calculator be in for sin and cos?

For graphing calculators, press “Mode.” If you are using degrees (generally, if you are in geometry), the calculator should be set to degrees or “deg.” If you are using radians (precalculus or trigonometry), it should be set to radians or “rad.” Press the “Cos” button, generally found in the middle of the calculator.

## Should I use RAD or DEG?

In particular, rotational motion equations are almost always expressed using radians. The initial parameters of a problem might be in degrees, but you should convert these angles to radians before using them. You should use degrees when you are measuring angles using a protractor, or describing a physical picture.

## Who invented calculator?

Texas InstrumentsJack KilbyCalculator/Inventors