If cos A=2over5,find the value of 4+4tan sq.A
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cosA=2/5
then 4+4tanA=4(1+tan²A)
=4sec²A
=(4×25)/4
=25
25 is the value of 4+4tanA
then 4+4tanA=4(1+tan²A)
=4sec²A
=(4×25)/4
=25
25 is the value of 4+4tanA
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