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If cos x° = 0.2, which of the following is the value of sin x°?
sina-sinb/cos a+cos b + cos a-cos b/sin a +sin b
If sin x = 0.20, cos x = .98, sin y = .12, and cos y = .99, which of the following is cos(x + y)?
If sin d° = 0.25 and sin k° = 0.75, which of the following is the value of cos d° + cos k°?
If cos x° = 0.2, which of the following is the value of sin x°?
If sin x = 0.20, cos x = .98, sin y = .12, and cos y = .99, which of the following is cos(x + y)?

A. -.94
B. -.95
C. .96
D. .95
If cos x° = 0.2, which of the following is the value of sin x°?

A. 0.98
B. 0.96
C. 0.78
D. 0.79
If tan A + sec A =L , then prove that (L2+L)/2L = sec A
(* note L2 is L square)
cot 4A = 1/cot 4A
If sin x = 0.20, cos x = .98, sin y = .12, and cos y = .99, which of the following is cos(x + y)?

A. -.94
B. -.95
C. .96
D. .95
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