Asked by Veronica
Which of the following are trigonometric identities, I have narrowed it down to two -
(cscx + cotx)^2 = 1
OR
sin^2(x)sec^2(x) + 1 = cot^2(x)csc^2(x)
(cscx + cotx)^2 = 1
OR
sin^2(x)sec^2(x) + 1 = cot^2(x)csc^2(x)
Answers
Answered by
Reiny
Before I go through the effort of proving a trig identity, I usually test it with some arbitrary value of an angle
Do not use one of the special angles, such as 30° or 45°, but pick something like 23°
for your first one:
LS = (csc 23° + cot 23°)^2
= (2.559 + 2.3558)^2
which is clearly not equal to 1
so the first one is not an identity.
Do the same with the second equation.
Do not use one of the special angles, such as 30° or 45°, but pick something like 23°
for your first one:
LS = (csc 23° + cot 23°)^2
= (2.559 + 2.3558)^2
which is clearly not equal to 1
so the first one is not an identity.
Do the same with the second equation.
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