Question

sin20°=cos .....° ,Fill in the blank.

Answer 1

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Sin 20 ° = cos.......

We know that,

Sin 20 ° = cos ( 90 ° - 20° )

So,

Sin 20 ° = cos 70 °

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Answer 2

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We know that ,

Sin x = Cos ( 90 - x )

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Here,

sin 20° = cos ( 90 - 20 )

=> sin 20° = cos 70°

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