Sin² 45° - sin² 15° – InterviewSolution

1.	Sin² 45° - sin² 15°
Answer» √3/4<br>sin²a-sin²b=sin(a+b)sin(a-b)sin²45-sin²15=sin(45+15)sin(45-15) =sin(60)sin(30) =(√3/2)(1/2)=√3/4<br>√3/4

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