`(sin^2 6 3^(@)+sin^2 2 7^(@))/(cos^2 1 7^(@)+cos^2 7 3^(@))`

The value of (sin 1^(@) +sin 3^(@) + sin 5^(@) +sin 7^(@))/(cos 1^(@)*cos 2^(@)sin 4^(@)) is __________

sin^2 52 1/2^@-cos^2 7 1/2^@

The value of log_(sec30^(@))(cos^2 6 7^(@)+cos^2 5 3^(@)+cos6 7^(@)*cos5 3^(@)) is equal to

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

(7sin ^ (2) 30 ^ (@) + 3cos ec ^ (2) 60 ^ (@) - cot ^ (2) 45 ^ (@)) / (sin ^ (2) 70 ^ (@) + sin ^ (2) 20 ^ (@)) + 2sin ^ (2) 30 ^ (@) - 2cos ^ (2) 30 ^ (@) 20

Value of 2 sin ^(2) "" (pi)/(6) + cosec ^(2) "" (7pi)/(6) .cos^(2) "" (pi)/(3) is (m)/(m-1). The value of 'm' is

sin ^ (6) A + cos ^ (6) A = 1-3sin ^ (2) A cos ^ (2) A

The least value of the expression y=(1)/((3sin^(2)x + 3 sin x cos x + 7 cos ^(2)x)) is equal to

int(7cos^(3)x+8sin^(3)x)/(3sin^(2)x cos^(2)x)dx

The value of (sin^2""7""1/2""+cos^2""7""1/2""^@)-(sin^2""30^@+cos^2""30^@)+(sin^2""7^@+sin^2""83^@) is equal to (a)3 (b) 3""1/2 (c)2 (d)1