`sin^(2) (pi/6)+cos^(2) (pi/3)-tan^(2) (pi/4)=-1/2`

Prove that: sin^2(pi/6)+cos^2(pi/3)-t a n^2pi/4=-1/2

The value of 2"sin"^(2)(pi)/(6)+"cosec"^(2)(7pi)/(6)."cos"^(2)(pi)/(3) is equal to

Prove that: 2sin^(2)((pi)/(6))+cosec^(2)((7 pi)/(6))cos^(2)((pi)/(3))=(3)/(2)

Prove that: 2sin^2(pi/6)+cosec^2((7pi)/6)cos^2(pi/3)=3/2

2sin^(2)""(pi)/(6)+cosec^(2)""(7pi)/(6) cos^(2)""(pi)/(3)=(3)/(2)

The value of the expression sin^(-1)(sin(22pi)/7)cos^(-1)(cos(5pi)/3)+tan^(-1)(tan(5pi)/7)+sin^(-1)(cos2) is (17pi)/(42)-2 (b) -2 (-pi)/(21)-2 (d) non eoft h e s e

2sin((2 pi)/(6))+cosec^(2)((pi)/(6))*cos^(2)((pi)/(3))=?

2sin^2(pi/6 )+c o s e c^2((7pi)/6)cos^2(pi/3)=3/2

Prove that: 2sin^2(3pi/4)+2cos^2(pi/4)+2sec^2(pi/3)=10

2sin^2 pi/6 +cose c^2 (7pi)/6 cos^2 pi/3=3/2