1) cos (150°)=- cos(180°-150°) = - cos(30°) and - cos30° = - √(3) / 2
sin(150°) = sin(180°-150°) =sin30. and sin30° = 1/2
Then : 5/2(cos 150° + i sin 150°) becomes : 5/2{(-√(3) /2 + I (1/2)]
OR 5/4( - √3 + i)
<span>TRUE
Each square is a rhombus therefore some rhombuses are squares.</span>
Answer:
Kristina will!
Step-by-step explanation:
Both Krista and Kevin found the right answer to Stacey’s question. Stacey will invest $108 in company A if she invests $24 in company B.
Answer:
Step-by-step explanation:
-9/10 or -0.9
The values of the angles are
i) acute ∠AOB = 10°
ii) acute ∠COD = 25°
iii) acute ∠BOC = 40°
iv) acute ∠AOD = 75°
<h3>Calculating the measured of angles </h3>
From the question, we are to determine the measures of the angles
i) acute ∠AOB
From the given diagram,
∠AOB = 10°
ii) acute ∠COD
From the given diagram,
∠COD= 25°
iii) acute ∠BOC
From the diagram, we can write that
∠AOB+∠BOC+ ∠COD + ∠DOE = 90° (<em>Angles at a right angle</em>)
10° + ∠BOC + 25° + 15° = 90°
∠BOC + 50° = 90°
∠BOC = 90° - 50°
∠BOC = 40°
iv) acute ∠AOD
From the diagram,
∠AOD = ∠AOB + ∠BOC +∠COD
∠AOD = 10° + 40° + 25°
∠AOD = 75°
Hence, the values of the angles are
i) acute ∠AOB = 10°
ii) acute ∠COD = 25°
iii) acute ∠BOC = 40°
iv) acute ∠AOD = 75°
Learn more on Calculating measures of an angle here: brainly.com/question/26354356
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