Please help me find the step by step proof to this question.

Please help me find the step by step proof to this question.

Verify the following identity: sin(α+β)+sin(α-β)=2sinαcosβ

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

Find all solutions to the equation in the interval [0,2pi). Enter the solutions in increasing order. cos 2x = sinx

- The basketball hoop has a height of 3.05m. Measure the distance out from the hoop to the centre circle If a person holding a basketball at eye level of height 165cm is standing at the...

If a person holding a basketball at eye level of height 165cm is standing at the centre circle what is the angle of depression from the hoop to the basketball?

sin π/5 cos π/2 + sin π/2 cos π/5 = ? ?π/?

Answer choices: A) sin theta = -1/2 B) sin theta = 1/2 C) sin theta = sqrt3/2 D) sin theta = - sqrt3/2

law of sines

Assume the terminal side of the angle falls in Quadrant 2. Show all work.

If n represents the number of gallons of oil he purchases, and c(n) represents the cost of the oil purchase, determine the best domain and range for the function

1. 1 2. 0 3. sin^2x 4. cos^2x

What is the value of sin A?

if the area of the triangle is 6,what is the length of side b?

angle x may equal... 1. 0 2. 30 3. 45 4. 150

help please

What is the value of sin A?

(cot2 theta + 1) (tan theta)

At midnight the water at a particular beach is at high tide. At the same time a gauge at the end of a pier reads 10 feet. Low tide is reached at 6 AM when the gauge reads 4ft.

find all values of θ in the interval 0°≤θ<360, that satisfies the equation sin(2θ)= sin θ

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