OpenStudy (anonymous):

How do I work out 5cos(squared)x + 4sinxcosx + 2sin(squared)x = 2 ???

6 years ago
OpenStudy (owlfred):

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6 years ago
OpenStudy (anonymous):

the equation simplifies to 3cos^2(x) +4sin(x)cos(x)=0 , take cos(x0 out and hence u get cos(x)(3cos(x) +4sin(x))=0 , => cos(x)=0 or tan(x)=-4/3 , use these to getto the solution. note tan(53 degrees)=4/3.

6 years ago
OpenStudy (anonymous):

sorry tan(x)=-3/4 is wat u get...tan(37 degrees) is =3/4 :)

6 years ago