9sec²60-9tan²60?
please give me the right answer
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Answered by
8
Solution :
******************************
We know the Trigonometric identity:
Sec²A - tan² A = 1
*******************************
Here ,
9sec²60 - 9tan²60°
= 9( sec² 60° - tan² 60° )
= 9 × 1
= 9
•••••
******************************
We know the Trigonometric identity:
Sec²A - tan² A = 1
*******************************
Here ,
9sec²60 - 9tan²60°
= 9( sec² 60° - tan² 60° )
= 9 × 1
= 9
•••••
davalipsa2002:
As per identity,
yes
Sec^2theta +tan^2theta=1. Then -sec^260° +tan^260° =1. 9×1=9
so now what i already have my answer
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1
Answer:
here is your answer
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