Trigonometry class 10

 $Sin^2A+Cos^2A$  

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• 2

• 0

 $Tan^2A-Sec^2A=$  

• 0

• 1

• -1

 $1+\tan^2A$  

•  $Sec^2A$  
  

•  $Co\sec^2A$  
  

Cot ² A -1

• Cosec² A

• Sec² A

• Tan ² A

Sin(90-A)

• Cos A

• CosecA

• SecA

Value of Sin A ------if angle A is increased

• Increases

• Decreases

Value of Cot A ------if angle A is increased

• Increases

• Decreases

If Sin θ = cos θ, find the value of θ

• 45⁰

• 60⁰

• 90⁰

If tan θ = cot (30° + θ), find the value of θ

• 60°

• 30°

• 90°

 $Cotθ\tan(90°–θ)–Sec(90°–θ)Co\secθ+\sqrt{3}\tan12°\tan60°\tan78°\ \ =\ --$  

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