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What are the mathematical formulas for height 1?
All formulas of compulsory mathematics in senior one are summarized as follows:

Two-angle sum formula.

sin(A+B)= Sina cosb+cosa sin(A-B)= Sina cosb-sinb cosa .

cos(A+B)= cosa cosb-Sina sinb cos(A-B)= cosa cosb+Sina sinb .

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

ctg(A+B)=(ctgActgB- 1)/(ctg B+ctgA)ctg(A-B)=(ctgActgB+ 1)/(ctg B-ctgA).

Double angle formula.

tan2A = 2 tana/( 1-tan2A)ctg2A =(ctg2A- 1)/2c TGA .

cos2a = cos2a-sin2a = 2 cos2a- 1 = 1-2 sin2a .

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))。

ctg(A/2)=√(( 1+cosA)/(( 1-cosA))ctg(A/2)=-√(( 1+cosA)/(( 1-cosA))。

Power reduction formula.

(sin^2)x= 1-cos2x/2。

(cos^2)x=i=cos2x/2。

General formula.

Let tan (a/2) = t.

sina=2t/( 1+t^2)。

cosa=( 1-t^2)/( 1+t^2)。

tana=2t/( 1-t^2)。