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1)IF sinx=cos2x, then cos2x(1 + cos2x) is?

2)SOLUTION SET OF (3/5)x=(x -x2-9) is?

6 years ago


Answers : (1)


Dear vardaan


sinx =1-sin2x

sin2x = 1-sinx  ..............1


now   cos2x(1 + cos2x) = sinx (1+sinx)

                                            =sinx + sin2x

                                            = sinx + 1-sinx         from equation (1)



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