Trig Key - Grosse Pointe Public School System / GPPS Home

2-30, *COS COS 79. sin2x cos2x -l- tan2x I—sinx COS x 81. I—sinx cos x tan2 x 83. sec x Cos Z see Cos cos2 x—sin2 x 82. 1—tan2 x COS S ; O COS cos¼ Use the sum and difference formulas to find the exact value. 84. cos 1950 3inC 85. sin 2550 COS)SOcosqç Find sin 2x , cos 2x, and tan 2x from the given information. 86. cosx = cscx < 0 ................
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