Math, asked by aartisatishdeshmukh, 2 months ago

The value of sin100°cos40°−cos100°sin40°=

Answers

Answered by Mahi856

0

Answer:

The value of sin100°cos40°−cos100°sin40°=1/2

Answered by shivammalge

0

Answer:

cos1000cos400+sin1000sin400

This is in the form of cosAcosB+sinAsinB=cos(A−B)

Therefore, cos1000cos400+sin1000sin400=cos(1000−400)

⇒cos1000cos400+sin1000sin400=cos600

⇒cos1000cos400+sin1000sin400=21

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