Math, asked by DAMBUSTERED, 5 months ago

SHOW THE FOLLOWING WITHOUT USING TRIGONOMETRY TABLE:-

(vii) cosec 39° cos 51° + tan 21°cot 69º - Sec²21° =0​

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Answered by tennetiraj86
13

Answer:

answer for the given problem is given

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Answered by lifekiller05
6

--》cosec 39° cos 51° + tan 21°cot 69º - Sec²21° =0

--》cosec(90°-51° )cos 51° + tan 21°cot(90°-69º - Sec²21° =0

--》sec 51° cos 51° + tan 21° tan 21° - Sec²21° = 0

--》1+ tan²21°-Sec²21° = 0

--》1+(-1)= 0 (∵ tan²21° - Sec² 21° = -1)

--》0

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