cos 30 cos 45 - sin 30 sin 45
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Answer:cos 30 = (√3)/2. cos 45 = 1/(√2).
sin 30= 1/2. sin 45= 1/(√2).
=>cos 30 cos 45 - sin 30 sin 45
=>√3/2 × 1/√2 - 1/2 × 1/√2.
=>√3/(2√2) - 1/(2√2)
=> √3-1/(2√2).
Step-by-step explanation:
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Answer:
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