Trigonometry revisions - boards

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Description and Tags

Formulas

Geometry & Trigonometry

Right Triangles & Trigonometry

NCERT Class XI

Math

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23 Terms

1
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Rad to D

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squred

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3
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Cos (x+y)

cosx cosy - sinx siny

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cos (x-y)

cosx cosy - sinx siny

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sin(x+y)

sinx cosy + cosx siny

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sin (x-y)

sinx cosy - cosx siny

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tan (x + y)

tanx +tan y

1- tanx tany

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tan (x-y)

tanx-tany

1+tanx tany

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cot(x+y)

cotx coty-1

coty +cotx

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cot (x-y)

cotx coty +1

coty - cotx

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cos2x

cos²x-sin²x 2cos² x -1 1- 2sin² x 1- tan² x

1+ tan²x

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sin2x

2sin x cos x. 2tanx

1+ tan² x

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tan 2x

2 tanx

1+ tan² x

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sin 3x

3sinx - 4 sin³ x

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cos 3 x

4 cos³ x - 3 cos x

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tan 3x

3tanx - tan³ x

1-3 tan² x

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cosx + cos y

cosx- cosy

Sinx + siny

sinx - siny

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  1. cos(x+y) +cos(x-y)

cos(x+y) -cos(x-y)

sin(x+y) + cos(x-y)

sin(x+y) - cos(x-y)

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General

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Sin ratios

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Derivation

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Imp

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B

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