## How do you find cos 37?

Answer.

The cos of 37 degrees is 0.79864, the same as cos of 37 degrees in radians.

To obtain 37 degrees in radian multiply 37° by / 180° = 37/180 .

Cos 37degrees = cos (37/180 × ..

## Is the value of sin 60?

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

## What is the value of sin 37 in fraction?

In gradians, sin(37 = 0.54902281799813174351781480019286. In degrees, sin(37 = 0.60181502315204827991797700044149.

## How do you find the value of sin 75?

Sin(A+B) = Sin A Cos B + Cos A Sin B. Sin 75 = Sin ( 45 + 30) = Sin 45 Cos 30 + Cos 45 Sin 30. Sin 75 = (1 / √2) ( √3 / 2) + (1 / √2) ( 1 / 2) = [ √3 + 1] / 2√2.

## How do you find sin 75 without a calculator?

Originally Answered: How do I calculate sin 75 degrees exactly (without a calculator)? Use sin(a+b)=sin(a)cos(b)+cos(a)sin(b). Split 75 into 45+30, so: sin(45+30)=sin(45)cos(30)+cos(45)sin(30).

## How do you find the value of sin 18?

Exact Value of sin 18°How to find exact value of sin 18°?Let A = 18°Therefore, 5A = 90°⇒ 2A + 3A = 90˚⇒ 2θ = 90˚ – 3A.Taking sine on both sides, we get.sin 2A = sin (90˚ – 3A) = cos 3A.⇒ 2 sin A cos A = 4 cos^3 A – 3 cos A.More items…

## 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°.

## What is the exact value of sin 15?

An exact value for sin15∘… Add to your resource collection We will use the identity sin(x−y)=sinxcosy−sinycosx. We have that sin15∘=sin(45−30)∘=sin45∘cos30∘−cos45∘sin30∘=1√2√32−1√212=√2√32×2−√22×2=√6−√24. and so, since cosθ is positive between 0∘ and 90∘, cos15∘=√6+√24.

## How do you find the value of sin 36?

Exact Value of sin 36°⇒ 2 sin A cos A = 4 cos3 A – 3 cos A.⇒ 2 sin A cos A – 4 cos3 A + 3 cos A = 0.⇒ cos A (2 sin A – 4 cos2 A + 3) = 0.⇒ 4 sin2 A + 2 sin A – 1 = 0, which is a quadratic in sin A.