contestada

Which of the following is not a fundamental​ identity?
A. [tex]1 = sin^2\theta + cos^2\theta[/tex]
B. [tex]cos\theta= \frac{tan\theta}{sin\theta}[/tex]
C. [tex]1+tan^2\theta = sec^2\theta[/tex]
D. [tex]cot\theta = \frac{1}{tan\theta}[/tex]

Respuesta :

Answer:b

Step-by-step explanation:

Given

Option a is correct because it is Pythagorean identity

[tex]1=\sin^2\theta +\cos^2\theta [/tex]

Option b is incorrect because

[tex]\tan \theta =\frac{\sin \theta }{\cos \theta }[/tex]

Option c and d are correct because c is Pythagorean identity .

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