Suppose that `acostheta = b` and `csintheta = d`, for `theta` and some constants a, b, c, d. Then which of the following is true?

Suppose that a cos theta=b and c sin theta=d, for and some constants a,b,c,d. Then which of the following is true? (1)a^(2)c^(2)=b^(2)c^(2)+a^(2)d^(2)(2)a^(2)d^(2)=b^(2)c^(2)+a^(2)c^(2)

If A=(d)/(2)(a+b) , then which of the following is/are true?

If A=(d)/(2)(a+b) , then which of the following is/are true?

Consider three observations a, b and c such that b=a+c. If the standard deviation of a+2, b+2, c+2 is d, then which of the following is true ?

Eliminate theta "from q cos "theta=b and c sin theta=d, where a,b,c,d are constants

If a/b=c/d and a,b,c,d are positive numbers, then which of the following statement are true?

If a, b, c, d are in proportion, then a : b = c : d and written as a : b : : c : d . Which of the following is true?