`sin^2 0^@ + cos^2 0^@=?`.

cos4 0^(@)+cos2 0^(@))=3(cos1 0^(@)+sin2 0^(@)) 40 CUSOUcos 40^@ + cos 20O 4(cos310^@ + sin320^@) = 3(cos 10^@ + sin20^@)N3.1 = 4

sin ^ (2) 48 ^ (0) -cos ^ (2) 12 ^ (0) = - (sqrt (5 + 1)) / (8)

If y sin 45^0 cos 45^0 = tan^2 45^0 cos^2 30^0 then y =

Ltquad x rarr0 (1-cos ^ (2) (sin x) -cos (sin ^ (2) x) + cos ^ (2) (sin x) cos (sin ^ (2) x)) / (x ^ ( 6)) =

Without using trigonometric tables,evaluate each of the following: (sin^(2)20^(@)+sin^(2)70^(@))/(cos^(2)20^(0)+cos^(2)70^(@))+(sin(90^(@)-theta)sin theta)/(tan theta)+(cos(90^(@)-theta)cos theta)/(cot theta)+cos(40^(0)+theta)-sin(50^(@)-theta)+(cos^(2)40^(0)+cos^(2)50^(@))/(sin^(2)40^(0)+sin^(2)50^(@))

sin^(6)A+cos^(6)A+3sin^(2)A cos^(2)A=0 b.1c2d.3

If cos^2 theta-sin^2 theta-3 Cos theta+2 =0 , 0^@ यदि cos^2 theta-sin^2 theta-3 Cos theta+2 =0 , है और 0^@< theta<90^@ है, तो 4Cosec theta + Cot theta का मान क्या होगा ?