Problem 1 :
The expression 2sin 30° cos 30° has the same value as
a. sin 15° b. cos 60° c. sin 60° d. cos 15°
Problem 2 :
The expression csc A sin 2A is equivalent to
a. 2sin A b. 2 c. 2cos A d. 2cot A
Problem 3 :
If sin A = 2/3, find cos 2A.
Problem 4 :
If sin A = 3/5, find cos 2A.
Problem 5 :
If θ is in Quadrant II and cos θ = -3/4, find an exact value for sin 2θ.
Problem 6 :
Problem 7 :
2sin x cos x - cos 2x = 2sin2x - 1 + sin 2x
Problem 8 :
cos2x + tan2x sin2x = sec2x sin2x + cos2x
Problem 9 :
Problem 10 :
1 + cos 2x - tan 4x cos 4x = 2cos2x - sin 4x
Problem 11 :
Problem 12 :
Problem 13 :
Problem 14 :
Problem 15 :
1) sin 60°, Option C
2) 2 cos A, Option C
3) 1/9
4) 7/25
5) -3√7/8
6) cos A
7) proved
8) proved
9) sin 2x
10) to 15) proved
May 21, 24 08:51 PM
May 21, 24 08:51 AM
May 20, 24 10:45 PM