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To evaluate sin30 plus cos60-2tan45, we start by finding the exact values of sin30, cos60, and tan45. sin30 = 1/2, cos60 = 1/2, and tan45 = 1. Substitute these values into the expression: 1/2 + 1/2 - 2(1) = 1/2 + 1/2 - 2 = 1 - 2 = -1. Therefore, sin30 plus cos60-2tan45 equals -1.
The total degrees between 45 degrees and -5 degrees is 50 degrees.
180 degrees - 100 degrees - 40 degrees = 40 degrees
30 degrees.
148 degrees minus 75 degrees is 73 degrees