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NDA Math Miscellaneous

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Question : 11

Total: 24

If sin‌β is the harmonic mean of sinα and cosα ,and sin‌θ is the arithmetic mean of sinα and cosα , then which of the following is/are correct?
1.√2‌sin(α+‌‌

)‌sin‌β=sin2α
2.√2‌sin‌θ=cos(α−‌‌

)
Select the correct answer using the code given below:

1 only
2 only
Both 1 and 2
Neither 1 nor 2

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