Question

Sin(-30)+2tg(-45)+cos(-45)​

Answer 1

=-sin30°-2tg45°+cos45°=-1/2 -2*1+√2/2=1+√2/2

Answer 2

To solve this expression, we'll use the following trigonometric identities:

• sin(-θ) = -sin(θ)
• cos(-θ) = cos(θ)
• tan(-θ) = -tan(θ)

Using these identities, we can rewrite the expression as follows:

sin(-30) + 2tan(-45) + cos(-45) = -sin(30) + 2(-tan(45)) + cos(45) (using the trigonometric identities) = -1/2 - 2(1) + 1/√2 (using the values of sin(30), tan(45), and cos(45)) = -5/2 + 1/√2

Therefore, the value of the expression is approximately -4.049.