Question

Given sin A = and that angle A is in Quadrant I, find the exact sec A in simplest radical form using a rational denominator

For 50pt

Answer 1

Answer: Read the step by step explanation

Explanation:

Since sin A = , we can use the Pythagorean identity to find cos A:

cos A = √(1 - sin²A) = √(1 - ( )²) = √(1 - ) = √()

Since A is in Quadrant I, both sin A and cos A are positive. Therefore, we can use the definition of secant to find sec A:

sec A = 1/cos A = 1/√() = √()/

To simplify the expression, we can rationalize the denominator by multiplying both the numerator and denominator by √():

sec A = (√()/)(√()/√()) = √()/ =

Therefore, the exact secant of A in simplest radical form using a rational denominator is .