Question

2cos180* +5 sin 90* -tg180*

Answer 1

cos180* = -1
sin 90* = 1
tg180* = 0

2cos180* +5 sin 90* -tg180* = 2*(-1)+5*1 - 0 = -2+5 = 3

Ответ: 3

Answer 2

To solve the trigonometric expression, let's first clarify the values of the trigonometric functions for the given angles:

cos(180°) = -1 sin(90°) = 1 tan(180°) = 0 (since tan(180°) is undefined, but the limit is 0 as it approaches 180° from either side)

Now, substitute these values into the expression:

2cos(180°) + 5sin(90°) - tan(180°)

= 2(-1) + 5(1) - 0

= -2 + 5

= 3

So, the value of the expression is 3.