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What are the mathematical formulas of senior one?
This paper summarizes the formulas commonly used in junior high school mathematics, and then looks at the specific content.

Power operation 1. Multiplication of the same base power: a m ×a n =a (m+n).

2. power (a m) n = a (mn), product (ab) n = a nb n

3. Division of the same base power: a m÷÷an n = a (m-n).

4. Zero index: a 0 = 1.

Factorization formula (a+b)(a-b)=a? -B?

(A and B)? =a? 2ab+b?

(a+b)(a? -ab+b? )=a? +b?

(a-b)(a? +ab+b? )=a? -B?

Answer? +b? =(a+b)? -2ab

(a-b)? =(a+b)? -4ab

The trigonometric function half-angle formula sin(A/2)=√(( 1-cosA)/2)

sin(A/2)=-√(( 1-cosA)/2)

cos(A/2)=√(( 1+cosA)/2)

cos(A/2)=-√(( 1+cosA)/2)

tan(A/2)=√(( 1-cosA)/(( 1+cosA))

tan(A/2)=-√(( 1-cosA)/(( 1+cosA))

Sin2A=2SinA*CosA, the double-angle formula of trigonometric function

cos2a=cosa^2-sina^2= 1-2sina^2=2cosa^2- 1

tan2A=(2tanA)/( 1-tanA^2)

Trigonometric function Trigonometric formula SIN3A = 4SINA * SIN (π/3+A) SIN (π/3-A)

cos3A = 4c OSA * cos(π/3+A)cos(π/3-A)

tan3A = tanA * tan(π/3+A)* tan(π/3-A)

The sum and difference formula of trigonometric function sin(A+B)=sinAcosB+cosAsinB.

sin(A-B)=sinAcosB-cossinB

cos(A+B)=cosAcosB-sinAsinB

cos(A-B)=cosAcosB+sinAsinB

tan(A+B)=(tanA+tanB)/( 1-tanA tanB)

tan(A-B)=(tanA-tanB)/( 1+tanA tanB)

Sum and difference of trigonometric function products Sinasinb =-[cos (a+b)-cos (a-b)]/2

cosAcosB=[cos(A+B)+cos(A-B)]/2

sinAcosB=[sin(A+B)+sin(A-B)]/2

cosAsinB=[sin(A+B)-sin(A-B)]/2

Trigonometric function and differential product sina+sinb = 2sin [(a+b)/2] cos [(a-b)/2]

sinA-sinB = 2cos[(A+B)/2]sin[(A-B)/2]

cosA+cosB = 2cos[(A+B)/2]cos[(A-B)/2]

cosA-cosB =-2 sin[(A+B)/2]sin[(A-B)/2]

tanA+tanB = sin(A+B)/cosa cosb = tan(A+B)( 1-tanA tanB)

tanA-tanB = sin(A-B)/cosa cosb = tan(A-B)( 1+tanA tanB)