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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.

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ProfBot

4mo ago

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