Math, asked by priyaja, 1 year ago

formulas for trigonometry for class 10

Answers

Answered by Anonymous
12
(perpendicular )2 + ( base )2 = ( hypotenuse )2


SinA = P / H

CosA = B / H

TanA = P / B

CotA = B / P

CosecA = H / P

SecA = H/B

Sin2A + Cos2A = 1

Tan2A + 1 = Sec2A

Cot2A + 1 = Cosec2A


1. TanA = SinA / CosA
2. CotA = CosA / SinA
3. CosecA = 1 / SinA
4. SecA = 1 / CosA



Sin (A +B) =SinA . CosB + CosA . SinB

Sin (A – B) = SinA . CosB – CosA . SinB

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

Sin ( A + B) . Sin (A – B) = Sin2A – Sin2B = Cos2B – Cos2A

Cos (A + B) . Cos (A – B) = Cos2A – Sin2B = Cos2B – Sin2A

Sin2A = 2 . SinA . CosA = 2 . TanA / (1 + Tan2A)

Cos2A = Cos2A – Sin2A = 1 – 2Sin2A = 2Cos2A – 1 = (1 – Tan2A) / (1 + Tan2A)

Tan2A = 2TanA / (1 – Tan2A)

 Sin3A = 3 . SinA – 4 . Sin3A

Cos3A = 4 . Cos3A – 3 . CosA

Tan3A = (3TanA – Tan3A) / (1 – 3Tan2A)

SinA + SinB = 2 Sin (A + B)/2 Cos (A – B)/2

SinA – SinB = 2 Sin (A – B)/2 Cos (A + B)/2

CosA + CosB = 2 Cos(A – B)/2 Cos (A + B)/2

CosA – CosB = 2 Sin(B – A)/2 Sin (A + B)/2

TanA + TanB = Sin (A + B) / CosA . CosB

SinA CosB = Sin (A + B) + Sin (A – B)

CosA SinB = Sin (A + B) – Sin (A – B)

CosA CosB = Cos (A + B) + Cos (A – B)

 SinA SinB = Cos (A – B) – Cos (A + B)

 

Answered by pinkirahangdalr
11
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