RD Sharma - Mathematics

Book: RD Sharma - Mathematics

Chapter: 7. Values of Trigonometric Functions at Sum of Difference of Angles

Subject: Maths - Class 10th

Q. No. 9 of Very Short Answer

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9

If then write the value of ab + bc + ca.


a=k


b—2k


c=-2k


ab + bc + ca.=0


Chapter Exercises

More Exercise Questions

2

If then write the value of