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Tan² theta minus one by cos …

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Tan² theta minus one by cos square theta = -1

Posted by Navjot Kaur 6 years, 4 months ago

CBSE > Class 10 > Mathematics

2 answers

Deepu ? 6 years, 4 months ago

Anjali's ans is correct.

0Thank You

Anjali Bhosale 6 years, 4 months ago

Consider tan²theta - 1/cos²theta Tan²theta -sec²theta ....(1/cos²theta =sec²theta) identity Therefore tan²theta -sec²theta =-1...(1+tan²theta=sec²theta therefore tan²theta -sec²theta =-1) Hence proved.

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CBSE > Class 10 > Mathematics