The values of `cos^2 73^0+cos^2 47^0-sin^2 43^0+sin^2 107^0` is equal to: (a) `1` (b) `1/2` (c) `(sqrt(3))/2` (d) `sin^2 73^@+cos^4 73^@`

cos^2 48^0-sin^2 12^0 is equal to

The total number of solutions of cos x= sqrt(1- sin 2x) in [0, 2pi] is equal to

(cos 10^0+sin 10^0)/(cos 10^0-sin 10^0) is equal to a. tan55^0 b. cos 55^0 c. -tan35^0 d. -cot35^0

cos(2pi -x) cos (-x) - sin(2pi +x) sin (-x) = 0

sin 2x + cos x =0

The value of sin\ (1/2cot^(-1)(-3/4))+cos(1/2cot^(-1)(-3/4)) is/are equal to a. 1 b. (3sqrt(2))/(10) c. sqrt(2)sin(1/2cot^(-1)(-3/4)+cot^(-1)(1))\ d. 2sin(pi-tan^(-1)(1)-1/2tan^(-1)(4/3))

For any "Delta"A B C the value of determinant |sin^2\ \ A cot A1sin^2B cot B1sin^2\ \ C cot C1| is equal to- s in A s in B s in C b. 1 c. 0 d. s in A+s in B+s in C

If cos("sin"^(-1)2/5+"cos"^(-1)x)=0 , then x is equal to _____

(cos x- cos y) ^(2) + (sin x - sin y) ^(2) =4 sin ^(2) "" ( x-y)/(2)