If cos a=25,cos a=25, find the value of 4+4tan2a
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Trigonometry,
We have cosA = 25
we have to find, 4 + 4tan²A
= 4(1 + tan²A)
now well use the idententy 1 + tan²A = sec²A
= 4 sec²A
As we know that secA = 1/cosA
= 4/cos²A
= 4/625
That's it
Hope it helped (︶^︶)
We have cosA = 25
we have to find, 4 + 4tan²A
= 4(1 + tan²A)
now well use the idententy 1 + tan²A = sec²A
= 4 sec²A
As we know that secA = 1/cosA
= 4/cos²A
= 4/625
That's it
Hope it helped (︶^︶)
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