(sinx)^2 = 1 when cosx is 0 at pi/2 and 3pi/2
cosx = 1 when sinx is 0 at 0
therefore, A
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Answer:
k = -23
Step-by-step explanation:
-14=k+9
Subtract 9 from each side
-14-9 = k+9-9
-23 = k
Answer:
I believe the answer would be 1/6
Step-by-step explanation:
The work already says that there are 2 possible choices. This would be 2/12. This is further simplified to 1/6. Hope this helps
Cos (B) = (a^2 + c^2 -b^2) / (2 * a * c)
cos (B) = (11^2 +17^2 -12^2) / (2 * 11 * 17)
cos (B) = (121 + 289 -144) / (374)
cos (B) = 266 / 374
cos (B) =
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0.7112299465
Angle B = </span></span></span>44.665 degrees