`sin1 2^(@)sin4 8^(@)sin5 4^(@)=`
(A) 1/8
(B) 1/6
(C)1/4
(D) 1/2

sin ^(2) 24 ^(@) - sin ^(2) 6^(@) = (sqrt5 -1)/(8).

sin(pi/3-sin^(-1)(-1/2)) is equal to (A) 1/2 (B) 1/3 (C) 1/4 (D) 1

The sum 1/(sin4 5^(@)sin4 6^(@))+1/(sin4 7^(@)sin4 8^(@)) +1/(sin 49^@ sin 50^@)+...+1/(sin 133^@ sin 134^@) is equal to

The sum 1/(sin4 5^(@)sin4 6^(@))+1/(sin4 7^(@)sin4 8^(@)) +1/(sin 49^@ sin 50^@)+...+1/(sin 133^@ sin 134^@) is equal to

sin(pi/3-sin^(-1)(-1/2)) is equal to(A) 1/2 (B) 1/3 (C) 1/4 (D) 1

(sin2^(@)+sin4^(@)+sin6^(@)+sin8^(@))/(cos1^(@)*cos2^(@)*cos5^(@))=

sin ^(2) 5 ^(@) + sin ^(2) 10 ^(@) + sin^(2) 15 ^(@) + ... + sin ^(2) 90^(@) is equal to : a) 8 (1)/(2) b) 9 c) 9 (1)/(2) d) 4 (1)/(2)

2sin ^ (2) (8 (1 ^ (@)) / (2)) + 4cos16 ^ (@) sin (7 (1 ^ (@)) / (2)) sin (8 (1 ^ (@)) / (2)) + cos32 ^ (@) =

If sin x+sin^(2)x=1, then cos^(8)x+2cos^(6)x+cos^(4)x=(A)2(B)1(C)3 (D) (1)/(2)

sqrt(2)cos A=cos B+cos^(3)B, and sqrt(2)sin A=sin B-sin^(3)B then sin(A-B)+-1(b)+-(1)/(2)(c)+-(1)/(3)(d)+-(1)/(4)