use addition identity to find the exact value of sin 75°

use addition identity to find the exact value of sin 75°

I am having trouble with knowing where to start this problem and my professor is online professor so I can't ask the questions without being through email and it is hard to communicate.

Find the angle between the hour hand and minute hand of a clock at 20 minutes past 11 in radian.

Verify the identity tan 0 ( tan 0 + cot 0 ) = sec^2 0

a. Find how far east point B is from A b. Find how far east point C is from A c. Find how far south point C is from A

the number of all possible ordered pairs (x,y),x,y belongs to R satisfying the system of equations x+y=2pi/3,cosx +cosy=3/2

Use left and right endpoints and the given number of rectangles to find two approximations of the area of the region between the graph of the function and the x-axis over the given interval. g(x)...

use a half angle identity to find the exact value of tan 45°

A 10ft diameter wheel spins at 50 rpm. What is the angular velocity of the edge of the wheel?

A 10ft diameter wheel spins at 50 rpm. What is the velocity at the edge of the wheel in feet per second?

Given tanθ=u and θ is in quadrant I Show that sinθ = u/√i+u^2

find all solutions for 2-3 sin t = 1 rounded to 5 decimal places

find all the solutions for cos x = -1/8

If 0 in not in Quadrant I and sec 0 = sqrt 2, find 0 in degrees

If angle w is in quadrant III and cos w =a, what is cos(w+pi)?

Prove the identity cot 0+1/cot 0 = 1+tan0

Let f(x) = 2 sin (3x-pie/4) find the value of the phase shift

find the amplitude of y = -3 sin 4x

Use left and right endpoints and the given number of rectangles to find two approximations of the area of the region between the graph of the function and the x-axis over the given interval. f(x)...

a telephone company needs to run a wire from the telephone pole across a street to the new house....how many rolls of wire are needed TRIG questions