Answered

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Cos(11*)cos(19*) - sin(11*) sin(19*)

Write the expression as a function of one number then find it’s exact value.

Sagot :

Vuyitmpangelaidn

Answer:

√3/2

Step-by-step explanation:

This is compound angle of cosine

cos(11+19)

=cos(30)

=√3/2

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