Question

0,3+sin²30°-cos²30°/2sin(-30°)=

Answer 1

=0,3+(1/2)²- (√3/2)²/2*(-1/2)=0,3+1/4+√3/2=0,55+√3/2

Answer 2

Answer in detail. 0.3 sin²30°-cos²30°/2sin(-30°)=

To answer this question, we need to use some trigonometric identities and properties. First, we can simplify the expression by using the following facts:

- sin(30°) = 1/2 - cos(30°) = √3/2 - sin(-30°) = -sin(30°) = -1/2

Substituting these values, we get:

0.3 sin²30°-cos²30°/2sin(-30°) = 0.3 (1/2)² - (√3/2)² / 2(-1/2)

Next, we can perform some arithmetic operations and simplify the fractions:

0.3 (1/2)² - (√3/2)² / 2(-1/2) = 0.3 (1/4) - (3/4) / (-1)

0.3 (1/4) - (3/4) / (-1) = 0.075 - (-0.75)

Finally, we can add the two terms and get the final answer:

0.075 - (-0.75) = 0.075 + 0.75 = 0.825

Therefore, 0.3 sin²30°-cos²30°/2sin(-30°) = 0.8250.3 sin²30°-cos²30°/2sin(-30°)