6. use the Trig identities to Simplify each of the following to an expression involving a single trig function with not fractions. fallen ( Sec U - ran V ) ( cs ( U + 1 ) =R 7. use sum / difffence angle formulas to find the exact values of : sin 6 ) tan ($50 )* = tan ' ( 4) - 15 , 96 4 . ) + 110 = 285. 9637 X 75. 964 255. 96 81 17. And all exact solutions of the following equations in the interval [0, 207) a ) 2cos * * Sinx - 120 ! 6 ) tanx sinx - Sink= 0 1