if cosA =2/5 find the value of 4+4 tan2A
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we know that, sec2a -tan2a=1
or,1/cosa-8 tan.2a=1
or, 5/2 -8 tan.2a=1
or, -8 tan .2a = 1+5/2
or, tan.2a= 4+8=12(ans)
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or,1/cosa-8 tan.2a=1
or, 5/2 -8 tan.2a=1
or, -8 tan .2a = 1+5/2
or, tan.2a= 4+8=12(ans)
please mark me as a braintest.
sumanta22:
it's the correct answer.
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