The angle lies in Quadrant II.
sin0=3/4
What is cos 0?
1 answer:
Answer:
cosФ is
⇒ B
Step-by-step explanation:
Let us solve the question using one of the identities of trigonometry
∵ sin²Ф + cos²Ф = 1
∵ sinФ = 
→ Substitute it in the rule above to find cos Ф
∴ (
)² + cosФ² = 1
∴
+ cosФ² = 1
→ Subtract
from both sides
∴ cos²Ф = 
→ Take √ for both sides
∴ cosФ = ± 
∵ Angle Ф lies on the second quadrant
∴ cosФ is a negative value
∴ cosФ =
∴ cosФ is
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