if cos is equals to 2 / 5 find the value of 4 +4 tan square a
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Answered by
194
Given that :
cos A = 2/5
we have to find :
4 +4tan²A = ?
solution :-
we know that :
(1 + tan² x ) = sec²x
and
secx = 1 / cos x
Here,
4 + 4 tan² A = 4 (1 + tan² A)
= 4 * sec²A
= 4 / cos²A
= 4 * (5/2)²
= 4 * 25 / 4
= 25 answer
cos A = 2/5
we have to find :
4 +4tan²A = ?
solution :-
we know that :
(1 + tan² x ) = sec²x
and
secx = 1 / cos x
Here,
4 + 4 tan² A = 4 (1 + tan² A)
= 4 * sec²A
= 4 / cos²A
= 4 * (5/2)²
= 4 * 25 / 4
= 25 answer
Answered by
32
Answer:
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