Represent angle(90-x) in terms of x

Represent angle (-x) in terms of x

Represent angle (270-x) in terms of x

Represent angle (180-x) in terms of x

Represents angle (360-x) in terms of x

Represent angle (180+x) in terms of x

Represent angle (270+x) in terms of x

If A, x and y are all distinct numbers , and A =(xy-2)/(x-y) which of the following represents x , in terms of A and y ?

If x is a positive acute angle and cosx=a, an expression for tanx in terms of a is

If tan50^@=x and cot(theta+5^@)=1 , then find the value of sec(90^@-theta) in terms of x.

Represent the angle between two vectors in terms of the scalar product of those vectors.