find the product of cos 30.cos45.cos60
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the answer is √3÷4√2.....hope it helps
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shivanim127pa5i6x:
please give me with solution
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cos30= √3/2
cos45=√2/2
cos60= 1/2
cos30×cos45×cos60= √3/2*×√2/2×1/2= (√3×√2×1)/2×2×2= √6/8
Hope it helps you. Please mark as the brainliest answer...
you can further do it by converting 8 to 2 root 2 and rationalising the entire equation by multiplying root 2 on both numerator and denominator
√6/8 = √6/2√2
Multiplying root on both numerator and denominator
√6×√2/2√2×√2=√12/4 [√12=√2×2×3]
2√3/4= √3/2
Multiplying root on both numerator and denominator
√6×√2/2√2×√2=√12/4 [√12=√2×2×3]
2√3/4= √3/2
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