5. Prove the following Identity: 1-cot20 1+cot20 +2cos20 = 1 6. Sole the equation for all that make the equation true in the given interval: sin20sine = cose 0 0 < 2 6. Sole the equation for all that make the equation true in the given interval: sin20sine = cose 0 0 < 2 b. Suppose could be any real number. What would the general solution for look like? 7. Find cos(2 + ) given that = sin -1 12 and = tan