- What is the reciprocal of cosine?
- How do you find the value of sin 37?
- How do you find sin 75 without a calculator?
- How do you find the value of sin 74?
- How do you find the value of sin?
- What is the exact value of sin 5pi 3?
- What is the exact value of sin degrees?
- Is the value of sin 60?
- What is the value of cos 37 in fraction?
- What is the formula for cos a B?
- How do you solve cos 75?
- What is an exact value?
- How do you find the value of sin 18?
- What is sin equal to?
- What is the value of sin 75 ∘?
- What is the exact value of sin 15?
- How do you find cos45?

## What is the reciprocal of cosine?

The cosecant is the reciprocal of the sine.

The secant is the reciprocal of the cosine.

The cotangent is the reciprocal of the tangent..

## How do you find the value of sin 37?

Expand it about 37 degrees, or 37*π/180 radians. This will give you a value. You can check that against an actual value whereby you use a protractor to sketch a triangle with a 37 degree angle and actual measurements of the diagonal and the opposite side to verify the Taylor series result.

## 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 74?

The sin of 74 degrees is 0.96126, the same as sin of 74 degrees in radians. To obtain 74 degrees in radian multiply 74° by π / 180° = 37/90 π. Sin 74degrees = sin (37/90 × π). Our results of sin74° have been rounded to five decimal places.

## How do you find the value of sin?

sin 75°: Now using the formula for the sine of the sum of 2 angles, sin(A + B) = sin A cos B + cos A sin B, we can find the sine of (45° + 30°) to give sine of 75 degrees.

## What is the exact value of sin 5pi 3?

The exact value of sin(π3) sin ( π 3 ) is √32 .

## What is the exact value of sin degrees?

The exact value of sin 180 is zero. Sine is one of the primary trigonometric functions which helps in determining the angle or sides of a right-angled triangle.

## Is the value of sin 60?

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

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

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 × . Our results of cos37° have been rounded to five decimal places.

## What is the formula for cos a B?

= sinA cosB − cosA sinB cos(A + B) = cosA cosB − sinA sinB cos(A − B) = cosA cosB + sinA sinB sin2 A + cos2 A = 1, sin 2A = 2 sinA cosA cos 2A = 2 cos2 A − 1=1 − 2 sin2 A 2 sinA cosB = sin(A + B) + sin(A − B) 2 cosA sinB = sin(A + B) − sin(A − B)

## 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 an exact value?

BSL Maths Glossary – Exact value – Definition Subject level: Credit. 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.

## 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…

## What is sin equal to?

Always, always, the sine of an angle is equal to the opposite side divided by the hypotenuse (opp/hyp in the diagram). The cosine is equal to the adjacent side divided by the hypotenuse (adj/hyp). (1) Memorize: sine = (opposite side) / hypotenuse. cosine = (adjacent side) / hypotenuse.

## What is 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.

## What is the exact value of sin 15?

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 cos45?

Answer and Explanation: The exact value of cos(45°) is √(2) / 2. If an angle in a right triangle has measure α, then the cosine of that angle, or…