- Solve the equation on the interval [0,2pi). tan(2theta)=-1?

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An astronaut lands on an alien planet. He places a pendulum (L = 0.200 m) on the surface and sets it in simple harmonic motion,? Sin =.6, theta is in quad 2, find the value of the remaining trig functions? Evaluate the function at the given value of x. Round your result to three decimal places.
g(x)=9000(2^x)
x=-2.5? Tarzan grabs 20 m long vine hanging 46◦ from vertical, pushes off at 8.2 m/s. What s his speed at lowest point of swing,θ=0?Neglect friction? A spaceship, 180 m long as seen on board, moves by the Earth at 0.911c. What is its length as measured by an Earth-bound observer? m?