Math, asked by harshithachouhan11c, 4 months ago

express cos31° - cos71° as a product

Answers

Answered by kishorgangadhare
0

Answer:

0.5315991462

Step-by-step explanation:

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Answered by akleoiny81yadav
0

Answer:

2sin51.sin20

Step-by-step explanation:

by using cos c -cos d = -2( sin(c+d)/2).sin((c-d)/2) formula

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