Math, asked by jaswitha31, 11 months ago

cos 100°.cos 40° + sin 100°.sin 40°

Answers

Answered by pooja200568

4

Answer:

cosA cosB + sinA sinB = cos(A-B)

cos100°.cos40° + sin100°.sin40°

= cos(100°-40°)

= cos(60°)

= 1/2

=> cos100°.cos40° + sin100°.sin40° = 1/2

Step-by-step explanation:

hope that it helps you

Answered by tennetiraj86

0

Answer:

answer for the given problem is given

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