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If the central angle =10 rad, and the area of the sector formed is 25 square units, find the area of the circle.
A vertical tower is 20 m high. A men standing at some distance from the
tower knows that the cosine of the angle of elevation of the top of the tower is 0.53
.How far is he standing from the froot of the tower ?
if secθ - tanθ= p find value of secθ and tanθ
sec(x)+tan(x)=2+squareroot{5} then find sin(x)+cos(x)
Let sin x = .77 and sin y = .33. Which of the following is cos 2x + cos 2y?

A. .62
B. .60
C. -.20
D. -.24
If cos(2m) = .11, which of the following is (cos m)2?

A. 0.555
B. 1.11
C. 2.22
D. .0745
Let sin p = .71. Which of the following is cos(2p)?

A. -.0082
B. .082
C. -.82
D. .0082
If sin a = .25 and cos b = .25, which of the following is sin b/2 + cos a/2 ?

A. 1.60
B. 1.32
C. .26
D. 1.06
Let cos p =.22. Which of the following is cos p/2 ?

A. .07
B. .78
C. .70
D. .80
Let sin m = .11. Which of the following is sin m/2?

A. .79
B. .78
C. .77
D. .05
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