91/41(_2/3)+(4/3)91/41+(_2/3)91/41. simplify using suitable property
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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
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