Express each of the following in the form sin α, where α is acute.
Problem 1 :
cos 14º cos 39º - sin 14º sin 39º
Problem 2 :
Express as a single trigonometric ratio.
a. cos A cos 2A - sin A sin 2A
b. cos A cos 3A + sin A sin 3A
Problem 3 :
cos 38º cos 8º + sin 38º sin 8º is equal to.
a) cos 30º b) cos 60º c) cos 45º d) cos 38º
Problem 4 :
Find the value of k such that for all real values of x.
Problem 5 :
Prove each identity.
Problem 6 :
Rewrite each expression as a single trigonometric ratio.
cos 4x cos 3x - sin 4x sin 3x
Problem 7 :
Rewrite each expression as a single trigonometric ratio, and then evaluate the ratio.
1) cos 53º
2) a) cos 3A b) cos 4A
3) cos 30º
4) the value of k is -√3.
6) cos 7x
7) 1/2
May 21, 24 08:51 PM
May 21, 24 08:51 AM
May 20, 24 10:45 PM