GMacbeth:
Hep solve

NgeneUkwenu:
If Govs, Ikpeazu, Otorm, Okowa, Ugwuanyi, could be re-elected despite not having a single project as an achievement in the last four years, then Yayaha Bello's Victory in November will be flawless...

PrinceCEE:
No 1: y = tan2x

y' = 2sec²2x

But from trigonometry, sec²x = 1 + tan²x
Hence sec²2x = 1 + tan²2x

==> y' = 2(1 + tan²2x)
y' = 2(1 + y²)

Follow same step for no2

Thescome:


y = tan2x
y' = dy/dx = 2sec²2x......eqn(1)

Considering the right hand side of the equation: 2(1+y²)

This equals 2(1+ (tan2x)²)

= 2(1 + tan²2x)...........eqn(2)

Recall from trig identity: 1 + tan²x = sec²x

similarly 1+ tan²2x = sec²2x

∴ eqn(2) becomes:
2(sec²2x) = 2sec²2x = 2(1+y²)............eqn(3)


comparing eqn(1) and eqn(3)

we have 2sec²2x = y' = 2(1+y²)

PROVED
Thank you sir

francisco327:
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hypertension:
My state is Just laughing APC. we will retire Ogboru on saturday. He thinks we play tribal politics.

Delta is PDP. Its our culture here.

2betja:
[color=#000099][/color]see below