Trig Functions stuf (1 Viewer)

[Slidey]

sinx.sec^2(x)=sinx/cos^2(x)
and:
tanx.secx=sinx/cosx * 1/cosx=sinx/cos^2(x)

Identical.

 

[velox]

okies cool. Fitz had one way, and i dont trust myself.

Is there a preferred way of writing them or...does it not matter at all?

 

[Slidey]

No problem. You should grow more confident with your skills as the year progresses.

 

[velox]

next one erghh....

Find area under 1- cos x between pi/2 and 0.

 

[velox]

And one more:

Given that Integral of 4/(1+x^2) dx = pi, find approximate values of pi using:
(a) Trapezoidal rule with two strips

thanks in advance

 

[Slidey]

Find area under 1- cos x between pi/2 and 0.

Integral 1-cosx dx = x-sinx from 0 to pi/2
=pi/2 - 1

And I don't know trapezoidal rule, sorry.

 

[velox]

Ok, i think the book is wrong. thanks.