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## What is value of 1 cos theta?

Explanation: 1+cos theta = sin theta/1 – cos theta. Muxakara and 4 more users found this answer helpful. Thanks 2.

### What is the formula for sin2x?

so that sin2x = 2 sin x cos x.

What is tan 1 called?

Inverse tangent is also called arctangent and is labeled \begin{align*}\tan^{-1}\end{align*} or arctan. The “-1” indicates inverse. Inverse Sine: If you know the opposite side of an angle and the hypotenuse in a right triangle, you can use inverse sine to find the measure of the angle.

What are the topics in trigonometry?

Trigonometry, the branch of mathematics concerned with specific functions of angles and their application to calculations. There are six functions of an angle commonly used in trigonometry. Their names and abbreviations are sine (sin), cosine (cos), tangent (tan), cotangent (cot), secant (sec), and cosecant (csc).

## What is the formula of Cos 4x?

hey friend the formula of cos4x is. = cos(2x)cos(2x) – sin(2x)sin(2x) = cos^2(2x) – sin^2(2x) = cos^2(2x) – (1 – cos^2(2x)) = 2cos^2(2x) – 1. cos(2x) = 2cos^2(x) – 1.

### What is Secx?

The secant of x is 1 divided by the cosine of x: sec x = 1 cos x , and the cosecant of x is defined to be 1 divided by the sine of x: csc x = 1 sin x .

What is the formula of cos 3x?

We must remember the formulacos(A+B)=cosAcosB−sinAsinB .

What is the value of tan 4 by 3?

We cannot find the value of tan(4/3) because tan53 degrees is 4/3 but if you ask in tan inverse (4/3) its 53 degrees.

## What are the double angle formulas?

The cosine double angle formula tells us that cos(2θ) is always equal to cos²θ-sin²θ. For example, cos(60) is equal to cos²(30)-sin²(30). We can use this identity to rewrite expressions or solve problems. See some examples in this video.

### What is cos 2 equal to?

Cosine 2 theta is 1 minus 2 sine squared theta, cosine 2 theta equals 2 cosine squared minus 1.

What are the 5 trigonometric functions?

Main Trigonometric Functions

• Sine (sin)
• Cosine (cos)
• Tangent (tan)
• Secant (sec)
• Cosecant (csc)
• Cotangent (cot)

What is sin of minus theta?

trigonometric ratios of minus theta|sin(−Θ)=−sinΘ ,cos(−Θ)=cosΘ

## What is tan theta formula?

Tan x formula The Tan Θ is the ratio of the Opposite side to the Adjacent, where (Θ) is one of the acute angles. Tan \Theta = \frac{Opposite Side}{Adjacent Side}

### How do you do trigonometry?

There are three steps:

1. Choose which trig ratio to use. – Choose either sin, cos, or tan by determining which side you know and which side you are looking for.
2. Substitute.
3. Solve.
4. Step 1: Choose which trig ratio to use.
5. Step 2: Substitute.
6. Step 3: Solve.
7. Step 1: Choose the trig ratio to use.
8. Step 2: Substitute.

What is the formula of 1 sin theta?

(Math | Trig | Identities)

sin(theta) = a / c csc(theta) = 1 / sin(theta) = c / a
cos(theta) = b / c sec(theta) = 1 / cos(theta) = c / b
tan(theta) = sin(theta) / cos(theta) = a / b cot(theta) = 1/ tan(theta) = b / a

What are 6 occupations that use trigonometry?

Trigonometry is used by engineers, medical services technicians, mathematicians, data entry specialists, loggers, statisticians, actuaries, drafters, chemists, economists, physicists, registered nurses, building inspectors, boilermakers, machinists and millwrights.

## What are the formulas in trigonometry?

Basic Trigonometric Function Formulas

• sin θ = Opposite Side/Hypotenuse.
• cos θ = Adjacent Side/Hypotenuse.
• tan θ = Opposite Side/Adjacent Side.
• sec θ = Hypotenuse/Adjacent Side.
• cosec θ = Hypotenuse/Opposite Side.
• cot θ = Adjacent Side/Opposite Side.

### What is 2sinxcosx?

sin( x + x ) = sinx.cosx + cosx .sinx. sin2x = 2sinx.cosx. verify :- Let x = 30° LHS = sin60° = √3/2.

Which is the sin 30?

The value of sin 30 degrees is 0.5. Sin 30 is also written as sin π/6, in radians. The trigonometric function also called as an angle function relates the angles of a triangle to the length of its sides.

What is the formula of 2 tan theta?

tan x/2 = sin x/ (1 + cos x) 1st easy equation tan x/2 = (1 – cos x) /sin x 2nd easy equation.