Question

Which is not correct formula ? *

sec² A =1+ tan² A

sin² A + cos² A = 1

cosec² A - cot² A= 1

sec² A + 1= tan² A​

Answer 1

Answer:

(d)

${sec}^{2}a + 1 = {tan}^{2} a$

Explanation:

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Answer 2

Option d (sec² A + 1 = tan² A).