Question

give some formulae in trigonometry
class 10thh​

Answer 1

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Trigonometry Formulas :

• sinØ = P/H

• cosØ = B/H

• tanØ = P/B

• cosecØ = H/P

• secØ = H/B

• cotØ = B/P

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》 sin²Ø + cos²Ø = 1

› sin²Ø = 1 - cos²Ø

› cos²Ø = 1 - sin²Ø

》 1 + cot²Ø = cosec²Ø

› cot²Ø = cosec²Ø - 1

› cosec²Ø - cot²Ø = 1

》 1 + tan²Ø = sec²Ø

› tan²Ø = sec²Ø - 1

› sec²Ø - tan²Ø = 1

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• sinØ = 1/cosecØ

coecØ = 1/sinØ

• cosØ = 1/secØ

secØ = 1/cosØ

• tanØ = 1/cotØ

cotØ = 1/tanØ

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At 0°

• sinØ = 0

• cosØ = 1

• tanØ = 0

• cosecØ = Not defined

• secØ = 1

• cotØ = Not defined

At 30°

• sinØ = 1/2

• cosØ = √3/2

• tanØ = 1/√3

• cosecØ = 2

• secØ = 2/√3

• cotØ = √3

At 45°

• sinØ = 1/√2

• cosØ = 1/√2

• tanØ = 1

• cosecØ = √2

• secØ = √2

• cotØ = 1

At 60°

• sinØ = √3/2

• cosØ = 1/2

• tanØ = √3

• cosecØ = 2/√3

• secØ = 2

• cotØ = 1/√3

At 90°

• sinØ = 1

• cosØ = 0

• tanØ = Not defined

• cosecØ = 1

• secØ = Not defined

• cotØ = 0

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