Question

Value of sec 840 degrees

Answer 1

Answer:

-2-2

Step-by-step explanation:

sec(840)sec(840)

sec(840)sec(840)Remove full rotations of 360360° until the angle is between 00° and 360360°.

sec(840)sec(840)Remove full rotations of 360360° until the angle is between 00° and 360360°.sec(120)sec(120)

sec(840)sec(840)Remove full rotations of 360360° until the angle is between 00° and 360360°.sec(120)sec(120)Apply the reference angle by finding the angle with equivalent trig values in the first quadrant. Make the expression negative because secant is negative in the second quadrant.

sec(840)sec(840)Remove full rotations of 360360° until the angle is between 00° and 360360°.sec(120)sec(120)Apply the reference angle by finding the angle with equivalent trig values in the first quadrant. Make the expression negative because secant is negative in the second quadrant.−sec(60)-sec(60)

sec(840)sec(840)Remove full rotations of 360360° until the angle is between 00° and 360360°.sec(120)sec(120)Apply the reference angle by finding the angle with equivalent trig values in the first quadrant. Make the expression negative because secant is negative in the second quadrant.−sec(60)-sec(60)The exact value of sec(60)sec(60) is 22.

sec(840)sec(840)Remove full rotations of 360360° until the angle is between 00° and 360360°.sec(120)sec(120)Apply the reference angle by finding the angle with equivalent trig values in the first quadrant. Make the expression negative because secant is negative in the second quadrant.−sec(60)-sec(60)The exact value of sec(60)sec(60) is 22.−1⋅2-1⋅2

sec(840)sec(840)Remove full rotations of 360360° until the angle is between 00° and 360360°.sec(120)sec(120)Apply the reference angle by finding the angle with equivalent trig values in the first quadrant. Make the expression negative because secant is negative in the second quadrant.−sec(60)-sec(60)The exact value of sec(60)sec(60) is 22.−1⋅2-1⋅2Multiply −1-1 by 22.

sec(840)sec(840)Remove full rotations of 360360° until the angle is between 00° and 360360°.sec(120)sec(120)Apply the reference angle by finding the angle with equivalent trig values in the first quadrant. Make the expression negative because secant is negative in the second quadrant.−sec(60)-sec(60)The exact value of sec(60)sec(60) is 22.−1⋅2-1⋅2Multiply −1-1 by 22.−2-2