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Prove: cos(3x)=sin(2x)
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Prove: cos(3x)=sin(2x)

User Carlos Chaguendo
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1 Answer

4 votes

Answer:

Explanation:

Step-by-step explanation:

By taking ( x = 18°)

L.H.S

cos(3x)=sin(2x)

cos(3x) = cos( 3X18°)= cos (54°)

= cos[ 90° - (2x18°)] ∵[ 90°- (2x18°) = 54°]

= ∴ sin ( 2x18°)

As (x = 18°)

= sin (2x) = R.H.S

User Duck Dodgers
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7.1k points
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