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Earn +20 ptsQ: What is cos 66.5 degrees?
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What is cos zero degrees?
It is: cos(0) = 1
Determine the measure of angle A if 0 degrees is smaller than or equal to A which is smaller than or equal to 90 degrees and cos125 degrees equals negative cos A?
cos(125) = cos(180 - 55) = cos(180)*cos(55) + sin(180)*sin(55) = -cos(55) since cos(180) = -1, and sin(180) = 0 So A = 55 degrees.
What is cosine of 42?
In radians: cos(42) = - 0.399965315 ---------------------- In degrees: cos(42) = 0.7431448255 ----------------------
What does cos 42 degrees equal?
cos(42o) = 0.7431448255 ==============( approximately 37/50 )
What is the cosine of 51 degrees?
cos(51°) ~ 0.63
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