Question

3. Find the value of sin 45°sin 30° + cos 45ºcos 30°.
soluson
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Answer 1

Answer:

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Answer 2

Here is your solution:-

Sin 45°=1/√2

Cos45°=1/√2

sin30°=1/2

Cos30°=√3/2

Therefore,

=Sin45°×cos30°+cos45°×sin30°

=1\√2 × √3\2 + 1\√2 × 1\2

=√3\2√2 + 1\2√2

=√3 +1\2√2

Therefore answer is √3+1\2√2