Evaluate each of the following

cos 60° cos 45° − sin 60° sin 45°

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Solution

We have to find the value of the following expression

…… (1)

Now,,

So by substituting above values in equation (1)

We get,

Therefore,

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Similar questions

Evaluate each of the following

cos $60^{\circ}$ cos $45^{\circ}$ - sin $60^{\circ}$ sin $45^{\circ}$

Evaluate each of the following

$\frac{s i n 30^{o}}{s i n 45^{o}} + \frac{t a n 45^{o}}{s e c 60^{o}} - \frac{s i n 60^{o}}{s i n 45^{o}} - \frac{s i n 30^{o}}{s i n 90^{o}}$

sin 45^{\circ} + cos 45^{\circ}

Evaluate each of the following

$(c o s 0^{o} + s i n 45^{o} + s i n 30^{o}) (s i n 90^{o} - c o s 45^{o} + c o s 60^{o})$

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