Question: I need help solving this problem with the steps #91 Use trigonometric function values of quadrantal angles to evaluate each expression. 85. cos 90 +

I need help solving this problem with the steps #91

Use trigonometric function values of quadrantal angles to evaluate each expression. 85. cos 90 + 3 sin 270 86. tan 0 - 6 sin 90 87. 3 sec 180 - 5 tan 360 88. 4 csc 270 + 3 cos 180 89 tan 360 + 4 sin 180 + 5 (cos 180)2 90. 5 (sin 909)2 + 2 (cos 270)2 - tan 360 91. (sin 180)2 + (cos 180)2 92. (sin 360)2 + (cos 360) 2

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