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Earn +20 ptsQ: What is this expression as the cosine of an angle cos30cos55 plus sin30sin55?
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Continue Learning about Trigonometry
What is the ratio of the cosine of an angle?
Fora right angle triangle: cosine angle = adjacent/hypotenuse
What is the cosine of a 60 degree angle?
60 degrees = 0.5 1/2
When you have a right angle what does the law of cosines reduce to?
cosine = adjacent/hypotenuse
What is the cosine of a 30 degree angle?
As a decimal: 0.866 As a fraction: √(3)/2
How do you find an angle using sine cosine tangent?
If you know the angle's sine, cosine, or tangent, enter it into the calculator and press <inverse> sine, cosine, or tangent. On MS Calc, in Scientific Mode, using Degrees, enter 0.5, then check Inv and the press sin. You should get 30 degrees. The other functions work similarly.
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