`( cos^(2) 33^(@) - cos^(2) 57^@)/( sin 21^(@) - cos 21^(@))=`

(cos^(2)33^(@)-cos^(2)57^(@))/(sin21^(@)-cos21^(@))=

The value of (cos^(2)33^(0)-cos^(2)57^(0))/(sin21^(0)-cos21^(0)) is

Convert the followng into products: (i) sin 53 ^(@) + sin 21 ^(@), (ii) cos 83^(@) - cos 17^(@), (iii) sin 50^(@)- cos 80^(@)

sin^2 33^@+cos^2 57^@=

Prove that: (cos^(2)33^(@)-cos^(2)57^(0))/((sin^(2)(21^(0)))/(2)-(sin^(2)(69^(0)))/(2))=-sqrt(2)

Prove that : (cos^2 33^@- cos^2 57^@)/(sin^2 frac (21^@) (2)- sin^2 frac (69^@)(2))=- sqrt2 .

cos57^(@)+sin27^(@)=

Prove that: (cos^2 33^@-cos^2 57^@)/(sin^2(21/2)^@-sin^2(69/2)^@)=-sqrt(2)

If x=sec57^(@) , then cot^(2)33^(@)+sin^(2)57^(@)+sin^(2)33^(@)+cosec^(2)57^(@)cos^(2)33^(@)+sec^(2)33^(@)sin^(2)57^(@) is equal to:

(cos ^ (3) 21 ^ (@) + cos ^ (3) 39 ^ (@)) / (cos21 ^ (@) + cos39 ^ (@))