Asked by nemo
1) Identify the initial amount and the growth rate of the following
1a)y=250(1+0.2)^t
2b) y=9.8(1.35)^t
2) Use special right triangles to state the value of the 6 trig functions for 30 degrees, 45 degrees and 60 degrees.
3) Use the calculator to evaluate the value of the following trig function.
cot 35 degrees 21 minutes 45 seconds
1a)y=250(1+0.2)^t
2b) y=9.8(1.35)^t
2) Use special right triangles to state the value of the 6 trig functions for 30 degrees, 45 degrees and 60 degrees.
3) Use the calculator to evaluate the value of the following trig function.
cot 35 degrees 21 minutes 45 seconds
Answers
Answered by
oobleck
surely you can evaluate the functions at t=0:
1a)y=250(1+0.2)^t at t=0: 250(1.02)^0 = 250
2b) y=9.8(1.35)^t at t=0: 9.8(1.35)^0 = 9.8
For the special triangles, consult your text. These come up very often, so learn them and love them! Just do it. It will save you a lot of time later. Just learn the sin, cos, tan. And recall that the other three functions are their reciprocals.
#3. What, you can't use your calculator?
35 degrees 21 minutes 45 seconds = 35 + 21/60 + 45/3600 = 2829/80°
tan 2829/80° = 0.7096
so, cot = 1/tan = 1.4091
1a)y=250(1+0.2)^t at t=0: 250(1.02)^0 = 250
2b) y=9.8(1.35)^t at t=0: 9.8(1.35)^0 = 9.8
For the special triangles, consult your text. These come up very often, so learn them and love them! Just do it. It will save you a lot of time later. Just learn the sin, cos, tan. And recall that the other three functions are their reciprocals.
#3. What, you can't use your calculator?
35 degrees 21 minutes 45 seconds = 35 + 21/60 + 45/3600 = 2829/80°
tan 2829/80° = 0.7096
so, cot = 1/tan = 1.4091
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