Math, asked by gagansingh83113, 6 months ago

prove that sin(20+a)=cos a

Answers

Answered by sanjaykumarson94

4

Answer:

✌✌✌✌✌✌✌✌✌✌✌✌

sin 20°=cos.............

we know that,

sin 20°=cos (90°-20°)

so,

sin 20°=cos 70°

Step-by-step explanation:

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