Math, asked by masuk666669, 9 months ago

Exercise 4(E)
Express the following as product of sine and
cosine
(a) cos 50 + cos 30

Answers

Answered by abhignan13

1

Step-by-step explanation:

cos50+cos30

we know that

cosA+cosB=2cos(A+B/2)cos(A-B/2)

=2cos(50+30/2)cos(50-30/2)

=2cos40cos10

Hope it's helpful

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