# What is tanA tanB tanC formula?

## What is tanA tanB tanC formula?

We have to prove that tan A + tan B + tan C = tan A*tan B*tan C for any non-right angle triangle. For any triangle the sum of the angles is equal to 180 degrees.

What is the formula of tan A B C?

By using the formula of tan (α + β) we can easily expand tan (A + B + C). Let us recall the formula of tan (α + β) = tan α + tan β/1 – tan α tan β. Therefore, the expansion of tan (A + B + C) = tan A + tan B + tan C – tan A tan B tan C/ 1 – tan A tan B- tan C tan A – tan B tan C.

What is the value of tan a tan B 10 C?

∴tanAtanBtanC=tanA+tanB+tanC=3 −13+3.

### What is the value of tan3a?

The formula for tan3A = [3tan(A)−tan^3(A)] / [1−3tan^2(A)]….Thank you.

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What is the formula of sin A B C?

Let us recall the formula of sin (α + β) = sin α cos β + cos α sin β, sin (α – β) = sin α cos β – cos α sin β and cos (α – β) = cos α cos β + sin α sin β. Therefore, the expansion of sin (A – B + C) = sin A cos B cos C – cos A sin B cos C + cos A cos B sin C + sin A sin B sin C.

What is sin 2A?

Answer: The value of sin 2A is √ 3 / 2.

## What is the value of tan a B?

In this triangle , A is the angle between b and c. And tan A is given as perpendicular devided by base . So, tan A = a/b , sin A = a/c , cos A = b/c .

What is the value of sin 3A?

Trigonometric function of sin 3A in terms of sin A is also known as one of the double angle formula. If A is a number or angle then we have, sin 3A = 3 sin A – 4 sin^3 A.

What is sin a B sin AB?

The standard formula for sin(A+B) is: sin(A+B)=sin(A)cos(B)+cos(A)sin(B) Now sin(−B)=−sin(B) and cos(−B)=cos(B) , so. sin(A−B)=sin(A)cos(B)−cos(A)sin(B)