(cos^(2)theta)/(cos^(@)0-cos^(@)theta)=2" find lhe raluectio "

If (cos^(2)theta)/(cot^(2)theta-cos^(2)theta)=3and0^(@)ltthetalt90^(@) , then find the value of theta .

If 0 le theta lt (pi)/(2) and cos theta+ cos^(2) theta+ cos^(3) theta=1 find the minimum value of tan theta .

Evaluate int _(0)^(pi//2) (cos^(4) theta)/(sin^(4) theta + cos^(4) theta)d theta

cos2 theta+3cos theta=0

Prove that :(sin theta cos(90^(0)-theta)cos theta)/(sin(90^(0)-theta))+(cos theta sin(90^(0)-theta)sin theta)/(cos(90^(@)-theta))=1csc^(2)(90^(@)-theta)-tan^(2)theta=cos^(2)(90^(@)-theta)+cos^(2)theta

If sin theta+sin^(2)theta=1 find the value of cos^(12)theta+3cos^(10)theta+3cos^(8)theta+cos^(6)theta+2cos^(4)theta+2cos^(2)theta-2

cos^(2)theta-sin theta.cos theta-(1)/(2)=0

cos^(2)theta-sin theta*cos theta-(1)/(2)=0

cos^(2)theta-sin theta*cos theta-(1)/(2)=0

cos^(2)theta-sin theta*cos theta-(1)/(2)=0