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Trigonometry (1 Viewer)

Thread starter nsbrando
Start date Jun 25, 2012

nsbrando

Member

#1

Find exact value, rational denominator if relevant

sin45 cos30 + cos45 sin30

Fus Ro Dah

Member

#2

$\\ \frac{1}{\sqrt 2} \times \frac{\sqrt 3}{2} + \frac{1}{\sqrt 2} \times \frac{1}{2} = \frac{\sqrt 3}{2 \sqrt 2} + \frac{1}{2 \sqrt 2} = \frac{1 + \sqrt 3}{2 \sqrt 2} = \frac{\sqrt 6 + \sqrt 2}{4} $ by rationalising the denominator again.$$

Leffife

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#3

(1/√2).(√3 / 2) + (1/√2).(1/2)

Now just continue.

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