Recent content by MatheusMkalo

cos²(x)+sin²(x) = 1 That?

I don't understand your question sorry '-'... tan(x) = sin(x)/cos(x)..

x? lol '-'

no... the demonstration of the formula..

I tried to find, but fail =/

I need a demonstration of how to get this formula

Demontration of: cos(x)² = 1 \overline{1+tan(x)²} Anyone know? If you don't understand: cos(x)² = 1/1+tan(x)²

No i don't see it '-' thank you very much xD

Hehe i found that too but i can't put in function of alfa and beta =/ Answer in book is: \alpha6 \overline{\beta}3 But i don't know how to do.

Problem in english: Whereas 2x = \alpha and 2y = \beta, write the expression (0,125)y-2x in function of \alpha and \beta Without logarithm...

If i compute 105 and others: 32000000+6100000+230000 = 38330000 But if i have 50 questions like that and 1 hour to do all the questions? '-' Don't have a easy way? Sorry, my english is bad.

Numeric value of y. y = 2.3*105+6.1*106+3.2*107 Without calculator, how? '-'

X = ?

(-3)² = (\sqrt{9})² --> True -3 = \sqrt{9} --> False Wolfram Alpha result: False

http://img3.imageshack.us/img3/8660/aassa.png Who discover that?