Evaluate sin30 plus cos60-2tan45

Answer 1

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.

Answer 2

Oh, dude, you're hitting me with some math here! So, sin30 is 0.5, cos60 is 0.5, and tan45 is 1. So, 0.5 + 0.5 - 2(1) equals 0.5 - 2, which is -1.5. Math is wild, man.

Answer 3

Alright, buckle up, buttercup. Let's break it down: sin(30°) = 0.5, cos(60°) = 0.5, and tan(45°) = 1. So, we have 0.5 + 0.5 - 2(1) = 0.5 - 2 = -1.5. There you have it, the answer is -1.5.

Answer 4

using the unit circle, sin 30 + cos 60 - 2tan 45 can be solved as follows:

= sin 30 + cos 60 - 2tan 45

= [1/2] + [1/2] - [2(1)]

= 1 - 2

= -1