Trigonometry class IX

sin θ =

• p/b

• b/h

• p/h

• h/p

sin θ × cosec θ =

(a)  

sec^2 θ + cos ^2 θ =

• 1

• -1

• 2

• -2

sin θ =

• 1/cosec θ

• 1/sec θ

• cos θ

• 1- cos^2 θ

cosec^2 θ - cot^2 θ

• 1

• -1

• 3

• sin θ

tan θ × cot θ =

(a)  

(a+b)^2 =

• a^2 + b^2 - 2ab

• a^2 + b^2 + 2ab

• a^2 + b^2 + 4ab

• a^2 - b^2 - 4ab

a^2 - b^2

• (a+b)× 1

• (a+b)(a+b)

• (a+b)(a-b)

• (a-b)(2)

(a-b)^3 =

• a^3-b^3 - 3ab (a-b)

• a^3+b^3 +3ab (a-b)

• a^3-b^3 - 3ab (a+b)

• a^3+ b^3 +3ab (a+b)

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