Question

sin A+B is equal to sin A× cos B + Cos A × Sin B and Cos A - Bis equal to Cos A ×cos B + sin A × Sin B find the value of (I) sin 75° and(ii) Cos 15°.

Answer 1

$sin(45 + 30) \\ sin45.cos30 + cos45.sin30 \\ 1 \div \sqrt{2} \times \sqrt{3} \div 2 + 1 \div \sqrt{2} \times 1 \div 2 \\ \sqrt{3 } + 1 \div 2 \sqrt{} 2$

Answer 2

Answer:

your answer is in the above mentioned attachment

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