Question

Write the value of cos^2Q - 1/sin^2Q

Answer 1

$cos {}^{2} q - 1 \div sin {}^{2}q \\ = sin {}^{2} q \div sin {}^{2} q \\ = 1$

Answer 2

Answer:

Step-by-step explanation:

-1

because cos^2Q + sin^2Q =1

              cos^2Q - 1 = -sin^2Q

therefore,

cos^2Q - 1 / sin^2Q = -sin^2Q / sin^2Q

                               = -1