Question

Find the value of sin18°× cos72° + cos 18°×sin72°​

Answer 1

Answer:

1

Step-by-step explanation:

{sin x= cos(90°-x)}

{cos x= sin(90°-x)}

sin18°×sin18°+cos18°×cos18°

sin²18°+ cos² 18°

{sin² x +cos² x= 1}

===>>1 is the answer...

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