If cos A=2/5, find the value of 4+4tan^2A
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4(1+tan^2A)= 4*sec^2A=4/cos^2A= 25
trijanya05:
sorry! not clear
what is not clear
i have used the identity sec^2A - tan^2A = 1
ok thanks
welcome
it should be 25
yes . i edited it right?
yeah!...
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