Question

Which of the following is not true?
A) sin teta = √1- cos² teta
B) sec² teta - tan² teta =1
C) cos teta . cosec teta = 1
D) tan teta . cot teta = 1
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Answer 1

Answer:

c) cos theta × cosec thita= 1

Step-by-step explanation:

cos thita × sec theta = 1

Answer 2

Answer:

third option is not true