# Quick Answer: How Do You Find Sin 120 Without A Calculator?

## How do you find sin 65 without a calculator?

Originally Answered: How we can find the value of cos65 without using calculator.

We can use the trigonometric formula: cos(a+b)=cos(a)*cos(b)-sin(a)*sin(b).

Then, cos65=cos60*cos5-sin60*sin5..

## Is the value of sin 60?

The exact value of sin(60°) sin ( 60 ° ) is √32 .

## 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). sin 35° ≈ 1/2 + (22/7)(1/36)(1/2)(7/4) = 1/2 + 11/144 = 83/144, This differs from the true value by less 1%.

## How do you find the value of sin 10?

For finding value of sin(10°), draw a line at 10° to the diameter from center.. Now, from the intersection of that line with the circle, draw a perpendicular line to the diameter line. “sin” is the vertical component. So measure the length of the perpendicular line drawn. Thats the sin value.

## Why Sine is called sine?

The word “sine” (Latin “sinus”) comes from a Latin mistranslation by Robert of Chester of the Arabic jiba, which is a transliteration of the Sanskrit word for half the chord, jya-ardha.

## What does a sine curve look like?

The domain of the sine function As you drag the point A around notice that after a full rotation about B, the graph shape repeats. The shape of the sine curve is the same for each full rotation of the angle and so the function is called ‘periodic’. The period of the function is 360° or 2π radians.

## How do you find an angle?

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 you find the value of sin 120?

By using the value of cosine function relations, we can easily find the value of sin 120 degrees. Using the trigonometry formula, sin (90 + a) = cos a, we can find the sin 120 value. We know that the value of cos 30 degrees is √3/2. Therefore, sin 120° = √3/2.

## What is formula for sine?

= 0.500. The sine function, along with cosine and tangent, is one of the three most common trigonometric functions. 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’:

## What is the exact value of tan 120?

The exact value of tan(120°) is -√(3). Since tan(120°) = tan(2 × 60°), we can use the tangent double-angle identity to…

## How do you calculate sin 37?

In gradians, sin(37 = 0.54902281799813174351781480019286. In degrees, sin(37 = 0.60181502315204827991797700044149. In radians, sin(37 = -0.6435381333569994606856700190808.

## How do you find sin25?

If you are supposed to find an exact value for sin(25), then you must find some expression involving special angles (and possibly factors of 1/2 or 2) that is equal to 25. Then you use sin(A+B), sin(A-B), sin(2x) or sin((1/2)x) to find the value you’re looking for. For example: which is an exact expression for sin(75).

## Is the value of sin 120?

Answer. As we all know the sine value of some angles such as : 30, 45, 60, 90, 180. But in degrees it’s sin 120=(✓3)/2.

## What is sin 150 value?

First of all, observe that 150=180−30 . the answer comes from the fact that cos(30)=√32 and sin(30)=12 are known values.