Thursday, 27 October 2011

4.1 exploring the primary trigonometric ratios of obtuse angles

we did a chart and
sinx=sin(180-x)
cosx=cos(180-x)
tanx=tan(180-x)

There are relationships between the value of a primary trigonometri ratio for an acute angle and the value of the same primary trigonometric ratio for the supplement of the acute angle.

We used sin and cosine laws to determine the sine lengths and angle measures in acute oblique triangles.

the next person to write the blog is the person with the smallest hands

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