Mathematics rules of H.S.C(trigonomettry)

Mathematics rules of H.S.C(trigonomettry)

So you want to learn about mathemetics rules of H.S.C

Rules of Trigonomettry:

1.	sin(-A)=-sinA	2.	cos(-A)=cosA
3.	tan(-A)=-tanA	4.	cosec(-A)=-cosecA
5.	sec(-A)=secA	6.	cot(-A)=cotA
7.	sin(A+B)=sinAcosB+cosAsinB	8.	cos(A+B)=cosAcosB-sinAsinB
9.	sin(A-B)=sinAcosB-cosAsinB	10.	cos(A-B)=cosAcosB+sinAsinB
11.	tan(A+B)=(tanA+tanB)/(1-tanAtanB)	12.	tan(A-B)=(tanA-tanB)/(1+tanAtanB)
13.	cot(A+B)=(cotAcotB-1)/(cotA+cotB)	14.	cot(A-B)=(cotAcotB+1)/(cotA-cotB)
15.	sinA+sinB=2sin(A+B/2)cos(A-B/2)	16.	sinA-sinB=2cos(A+B/2)sin(A-B/2)
17.	cosA+cosB=2cos(A+B/2)cos(A-B/2)	18.	cosA-cosB=2sin(A+B/2)sin(B-A/2)
19.	sin2A=2sinAcosA	20.	cos2A=cos²A-sin²A
21.	sin2A=2sinAcosA	22.	cos2A=cos²A-sin²A
23.	cos2A=1-2sin²A	24.	cos2A=2cos²A-1
25.	tan2A=2tanA/(1-tan²A)	26.	cot2A=(cot²A-1)/2cotA
27.	1-cos2A=2sin²A	28.	1+cos2A=2cos²A
29.	sin2A=2tanA/(1+tan²A)	30.	cos2A=(1-tan²A)/(1+tan²A)
31.	sin3A=3sinA-4sin³	32.	cos3A=4cos³A-3cosA
33.	tan3A=(3tanA-tan³A)/(1-3tan²)	34.	H.S.C

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