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Rina8888 [55]
2 years ago
5

Find the exact value of csc² 30° + cos² 45°.​

Mathematics
1 answer:
natulia [17]2 years ago
5 0

\large \underline{ \mathbb{QUESTION:}}

Find the exact value of csc² 30° + cos² 45°.

\large \underline{ \mathbb{SOLUTION:}}

\tt{csc^{2}   \: 30^{o}  \:  +  \: cos^{2}  \: 45^{o}  \:  =  \: 2^{2}  \:  +  \: ( \frac{1}{ \sqrt{2} }^{2}) }

\: \: \: \: \: \: \: \: \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \: \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \tt{ =  \: 4 \:  +   \:  \frac{1}{2} }

\:\:\:\:\:\:\:\:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \: \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:   \boxed{\tt{ \red{ =  \: 4 \frac{1}{2} }}}

Therefore the exact value of csc² 30° + cos² 45° is \tt\red{4 \frac{1}{2} }

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