If cos x = a, where π/2 < x < π and cos y = -a, then which of the following could be the value of y?

If cos x = a, where π/2 < x < π and cos y = -a, then which of the following could be the value of y?

Nothing A

1. (sec x-1)(sec x+1) = tan2x 2. cot 2θ = cot2 θ-1 -------------...

A) -1 B) 1 C) 0 D) undefined E) none of these

The angle of depression from the top of a 15 m tree down to a pond is 25c41l. If a bird is perched in the top of the tree, how far does it need to fly to reach the pond, to the nearest metre?

Point P(θ) is at the intersection of the unit circle and the terminal arm of angle θ 1.5π/6 2. P(5π/3) 3.P(-5Π/4)

Express the complex number in trigonometric form. -2i

Express the complex number in trigonometric form. -4

Project Survey: A surveyor at point A on the south side of a canyon needs to find the distance between the tree T and the rock formation R on the canyon’s north side ( , see figure). To make this...

A chemist has 10 milliliters of a solution that contains a 30% concentration of acid. How many milliliters of pure acid must be added in order to increase the concentration to 50%?

A teacher’s salary is modeled by the equation an=48,000(1.0325)t−1 where t represents years of experience. How much should this teacher expect to pay in their 5th year of teaching? A. $52,833...

If 0≤u<pi/2 and x=secu, then √x^2−1=f(u), where f(u)=

The discs are hovering at a direct distance of 826 m and 1.296 km from the receiver. Find the difference in height between the two unidentified flying disc, to the nearest meter.

A pilot flies in a straight path for 1 h 30 min. She then makes a course correction, heading 10 degrees to the right of her original course, and flies 2 h in the new direction. If she maintains a...

What is the value of sin A?

Willis Tower (formerly Sears Tower) is 1451 ft tall, with the Skydeck (observation deck) at 1353 feet. The advertising literature for the Skydeck claims a person can see for 40 – 50 miles. Imagine it...

A submarine traveling from the east, fires a torpedo at a ship traveling at a 300° bearing. The torpedo is fired 7.4° north of west. How much faster must the torpedo be traveling than the ship in...

Answer me in a simple method

For how many values of x between 0 and 2π does sin[3x] = 1/2?

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