Show your solution

4. Proving Identity. Identity the missing function of the identity. sin20 - 2 sin 0 + 1 =-1+ sin 0 - 1 1 + sec2 0 = 1+ sec2 0 sec2 0 - sin2 0 sec2 0 = cot x + tanx = sec x cot x CSC X cos e sin 0 1 - tan 0 + = sin 0+ 1 - cot 0 sec x cscr = cota+ Find the exact value of the expression. 1. Cos 30 + cos2 60 2. cot 45 - tan 45 3. sin 53 + cos2 35 Determine what the original trig function and angle measure were used base on the given. cos 40 cos 50 - sin 40 sin 50