Question

Cos106° step by step method

Answer 1

Answer:

Cos 106°

Lies in 2nd Quad so +be sign

+Sin(90+16). Here sin changes to cos since there is 90

Cos(16°)

Cos(53-37)

Cos(A-B)=CosACosB+SinASinB

=Cos53°Cos37+Sin53°Sin37°

=(3/5)*(4/5)+(4/5)*(3/5)

=12/25+12+25

=24/25

Step-by-step explanation:

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