Math, asked by timeservice12, 10 months ago

How can we represent cos20°-cos40°
in terms of sin...?

Answers

Answered by Anonymous

3

Step-by-step explanation:

Cos20° - Cos40°

Sin70° - Sin50°

2 Cos60° * Sin10°

2 Sin30° Sin10°

2 * 1/2 * Sin10°

= Sin10°

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