In this case you could obtain the values of the trig functions in many ways, including using a calculator, using a table of trig functions (old fashioned!), using an illustration which shows various common angles (including 45 and 90 degrees) and their related trig functions. Or you could memorize the values of the sine, cosine and tangent functions, which I highly recommend.
1
sin 45 deg = -----------
sqrt(2)
1
cos 45 deg = ----------
sqrt(2)
tan 45 deg = 1/1 = 1
cos 90 deg = 0
sin 90 deg = 1
tan 90 deg: undefined
Answer:
I believe that m∠DBF = 92°
Step-by-step explanation:
Answer:
<em>m∠A = </em>
<em>A. 66°</em>
Step-by-step explanation:
∠C = ∠B
57 + 57 = 114
∠A = 180 - 114 = 66
Answer:
D
Step-by-step explanation:
The lines are parallel, this means that they will never meet.