Which of the following numbers is/are twin prime with 5 `(C)4((cos^3 10^0+sin^3 20^0)/(cos 10^0+sin20^0))` `(D)(cos 68^0)/(sin56^0 sin 34^0 tan 22^0)`

(2cos 40^0-cos 20^0)/(sin 20^0)=

Which of the following number(s) is/are rational? (a) sin15^0 (b) cos15^0 (c) sin15^0cos15^0 (d) sin15^0cos75^0

Which of the following number (s) is/are rational ? a.sin 15^0 b. cos 15^0 c.sin 15^0cos 15^0 d. sin 15^0 cos 75^0

Which of the following number(s) is/are rational? (a) sin15^0 (b) cos15^0 (c) sin15^0cos15^0 (d) sin15^0cos75^0

Which of the following number(s) is/are rational? (a)sin 15^(0)(b)cos15^(0)(c)sin15^(0)cos15^(0)(d)sin15^(0)cos75^(0)

Which of the following numbers is/are twin prime with 5(A)4(sin^(2)(83)^(0)+cos^(2)67^(0)-sin83^(0)cos67^(0))(B)48sin((90^(@))/(17))cos((180^(@))/(17))cos((360^(@))/(17))cos((720^(@))/(17))

Prove that : (cos 20^0 - sin 20^0)/(cos 20^0 + sin 20^0) = tan 25^0

Prove that (cos10^0+sin10^0)/(cos10^0-sin 10^0)=tan55^0

Prove that (cos10^0+sin10^0)/(cos10^0-sin 10^0)=tan55^0

Prove that : (cos 10^0 - sin 10^0)/(cos 10^0 + sin 10^0) = tan 35^0