# What is the formula of sin(A-B) in Trigonometry 2021

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## Formula Questions and Answer: What is the formula of sin(A-B) in Trigonometry 2021

### What is Formula of sin(A-B) in Trigonometry

sin(A-B)= sinAcosB-cosAsinB

### What is sin(A-B)?

It is one of the important trigonometry formulas which helps in determining the compounding angle. It is also known as the sine difference formula. Its formula is explained above.

### What is Formula of sin(A+B) in Trigonometry

Answer for the Formula of sin(A+B)

sin(A+B)= sinAcosB+cosAsinB

### What is Formula of cos(A+B) in Trigonometry

Answer for the Formula of cos(A+B)

cos(A+B)=cosAcosB-sinAsinB

### What is Formula of cos(A-B) in Trigonometry

Answer for the Formula of cos(A-B)

cos(A-B)=cosAcosB+sinAsinB

### What is sin(a+b)-sin(a-b) in Trigonometry

Below is the answer for sin(a+b)-sin(a-b).

sin(a+b)-sin(a-b)

=(sinacosb+cosasinb)-(sinacosb-cosasinb)

=2cosasinb

### sin(a+b)-sin(a-b) formula

sin(a+b)-sin(a-b) = 2cosasinb

As sin(a+b) : (sinacosb+cosasinb),

And sin(a-b) : (sinacosb-cosasinb),

After solving both the term you will get as above.

2cosasinb OR 2cosAsinB

### cos(a+b)-cos(a-b)

Solution :

As cos(a+b) = cosacosb-sinasinb

And cos(a-b) = cosacosb+sinasinb

cos(a+b)-cos(a-b)

cosacosb-sinasinb-cosacosb-sinasinb

= 2sinasinb

### What is the formula for sinA+sinB in Trigonometry

formula for sinA+sinB is given below

sinA+sinB = 2sin(a+b)/2cos(ab)/2

### 2 sin a sin b formula

Complete solution is explained above.

2 sin a sin b = cos(a+b)-cos(a-b)

as cos(a+b) = cosacosb-sinasinb

and cos(a-b) = cosacosb+sinasinb