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Which of the following is a trigonometric identity? cot 0 + tan 0 = 1 sec2 0 +csc2 0 = 1 tan2 0 = sin2 0 x sec2 0 co
Question
Which of the following is a trigonometric identity?
cot 0 + tan 0 = 1
sec2 0 +csc2 0 = 1
tan2 0 = sin2 0 x sec2 0
cos2 = sec2 0 x tank 0
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Mathematics
3 years
2021-08-27T00:59:12+00:00
2021-08-27T00:59:12+00:00 2 Answers
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Answers ( )
Answer:
third one
I’m assuming does 2’s are squared symbols.
Step-by-step explanation:
It’s the third one because
sin^2 x sec^2 x
sin^2 x (1/cos^2 x) by reciprocal identity
sin^2 x/cos^2 x by multiplicative identity prop
tan^2 x by quotient identity
The first one wouldn’t work because plugging in pi/4 gives 1+1=1 which isn’t true.
The second one doesn’t work because plugging in pi/4 gives 2+2=1 which isn’t true.
The last equation doesn’t make sense at all. There is no variable on the left and on the right there is an extra variable.
Answer:
it’s the first one… I think