Download sin 40 cos x ° = 5. If cos72 sinx = 8. If cos3x sin60 = m C 90 ∠ = ° (1

Geometry CC
1.
Assignment #22
Trigonometry – Co-Functions
If cos  x  30    sin x , a measure of angle x is
(1) 15°
2.
(2) 30°
(4) 60°
Which value of x satisfies the equation sin40  cos x ?
(1) 20°
3.
(3) 45°
(2) 40°
(3) 50°
(4) 80°
Which is the value of x if sin60  cos  x  10   ?
(1) 10°
(2) 20°
(3) 50°
(4) 60°
4.
If cos 2x  25  sin35 , find x.
5.
If cos 72  sin x , find the number of degrees in the measure of angle x.
6.
If sin  2x  25  cos 55 , find the value of x.
7.
If cos 2x  20   sin 40 , find x.
8.
If cos 3x  sin60 , find the value of x.
9.
If sin  4m  11  cos(3m  12)
10. In scalene triangle ABC shown in the diagram to the right,
mC  90 . Which equation is always true?
(1) sin A  sinB
11.
(2) cos A  cosB
(3) cos A  sinC
(4) sin A  cosB
Which expression is always equivalent to sin x, when 0  x  90 ?
(1) cos  90  x 
(2) cos  45  x 
(3) cos  2x 
(4) cos x
12. In ABC , the complement of B is A . Which statement is always true?
1.
2.
3.
(1) tan A  tan B
(2) sin A  sin B
2
3
2
15
18
30
4.
5.
6.
7.
8.
9.
(3) cos A  sin B
15
10
13
(4) cos A  tan B
10. 4
11. 1
12. 3