sin²x + cos²x

1 + tan²x

1 + cot²x

if a ∙b = 0

when differentiating with respect to x then 4y² will become...

5x + 1
(x – 1)(2x + 1)²
expressed as partial fractions

sin 2A

cos 2A

tan2A

∫e^ax dx

∫f'(x) dx
f (x)

the modulus of a vector |a|

r = p + λd

acute angle in vectors cos ϴ =