Question

sin2A =1/2tan^2 45°​

Answer 1

Step-by-step explanation:

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Answer 2

Answer:

Step-by-step explanation:

Given,

sin²A = 1/2 tan²45°

⇒ sin²A = 1/2 × 1 [∵ tan45° = 1]

⇒ sin²A = 1/2

⇒ sin²A = sin²45

⇒ sinA = sin45°,

since A is an acute angle  

⇒ A = 45°

∴ A = 45°

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