Respuesta :
Answer:
tan²A +1 = sec²A; cotA = -(3√7/7); A = 311.41°
Step-by-step explanation:
secA = 4/3
sec²A = 16/9
Use the identity tan²A +1 = sec²A
tan²A = sec²A - 1 = 16/9 - 1 = 7/9
cot²A = 1/tan²A = 9/7
We are in the fourth quadrant, so the cotangent is negative.
cotA = -√(9/7) = -3/√7 = -(3√7/7)
tan A = 1/cotA = -√7/3
A = -48.59° = 311.41°
The value are tan²A +1 = sec²A
cotA = -(3√7/7);
A = 311.41°
What is trigonometry?
A branch of mathematics called trigonometry examines connections between triangles' sides and angles. Due to the fact that every straight-sided form can be decomposed into a group of triangles, trigonometry may be found across all of geometry.
Given
secA = 4/3
sec²A = 16/9
Use the identity tan²A +1 = sec²A
tan²A = sec²A - 1 = 16/9 - 1 = 7/9
cot²A = 1/tan²A = 9/7
We are in the fourth quadrant, so the cotangent is negative.
cotA = -√(9/7) = -3/√7 = -(3√7/7)
tan A = 1/cotA = -√7/3
A = -48.59° = 311.41°
To know more about trigonometry refer to :
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