What is the value of sin A?

What is the value of sin A?

(cot2 theta + 1) (tan theta)

1. (sec x-1)(sec x+1) = tan2x 2. cot 2θ = cot2 θ-1 -------------...

Determine the integer values of n for which n^2-18n+45 is a prime number.

let n∈N. if a,b,c,d ∈ N and a≡b (mod n) and c≡d (mod n) prove that ac≡bd (mod n). Please, any help would be greatly appreciated. This is a study question on my study guide and I'm having...

prove that there does not exist n∈N such that n≡2 (mod 4) and n≡4 (mod 8). Please help this was on my last exam but I was very lost and my professor did not have enough time to go over it in class...

what is and a and b if ax43 + bx47=1. Please show me the steps I really want to know how to go about a problem like this. I got this wrong on the latest exam and my professor never goes...

a) Factorise 3x^2+19x+20. b) Hence, Factorise 3(y-2)+19(y-2)+20

Please help me find the answer!

This is a hard math problem.

This is a hard math problem.

The lengths of three sides of a regular hexagon are (12x+9y) cm, (7x+6y+3) cm and (4x+5y+2) cm. Find, (a) the values of x and y (b) the perimeter of the figure

The answer is ???

The answer is ???

How many gallons?

How many ounces?

? mph and ? mph

? pounds at $1.16 and ? pounds at 86 cent

The answer is ? tablespoons!

Please help me!