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Jana is proving that the following trigonometric identity is true: cos(−θ)⋅tanθ=sinθ Which step would be the first line of her proof? cos(−θ)⋅tanθ=sin(−θ) cosθ⋅tan(−θ)=sinθ cosθ⋅tanθ=sinθ cos(−θ)⋅tan(−θ)=sin
answered
Feb 1, 2019
Mathematics
high-school
2
votes
175k
views
Which of the following is true about the expression 5 x 1/4? Choices: It represents the product of a rational and irrational number and is equivalent to a rational number. It represents the product of
answered
Oct 21, 2018
Mathematics
high-school
6
votes
213k
views
What is the primary reason why increasing numbers of latin american citizens have immigrated to the united states over the past three decades?
answered
Oct 1, 2018
History
high-school
3
votes
154k
views
How are tone and the meaning of words related?
answered
Apr 5, 2018
English
high-school
5
votes
163k
views
This figure shows the procedure for constructing a A. Pair of parallel lines B. Bisector of an angle C. Perpendicular from a point on a line D. Perpendicular bisector
answered
Mar 21, 2018
Mathematics
high-school
1
vote
151k
views
Which waves have the highest frenquencies? A- waves with the lowest energy B- UV C- microwaves D- waves with the highest energy
answered
Jan 10, 2018
Physics
middle-school
6
votes
5.1k
views
You start the month with $332.11 in your checking account. You have the following withdrawals during the month: $34.56, $223.00, $12.22. You have deposits of $125.88 and $29.88 during the month. What is
answered
Nov 13, 2017
Mathematics
high-school
1
vote
188k
views
What is produced by the movement of electrons?
answered
Sep 26, 2017
Chemistry
high-school
1
vote
85.9k
views
Any nonzero integer divided by zero equals zero. True or False and justify.
answered
Apr 13, 2017
Mathematics
middle-school
5
votes
46.6k
views
Describe the flow of energy that causes heat to be produced
answered
Oct 11, 2016
Physics
high-school
2
votes
119k
views
J. J. Thomson s experiments provided evidence that an atom A. is the smallest particle of matter. B. contains negatively charged particles. C. has a negative charge. D. has a positive charge
answered
May 9, 2016
Physics
high-school
5
votes
104k
views
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