Math, asked by 3altafsiddique, 6 months ago

find: cos (70°+theta)cos(10°+theta)+sin(70°+theta)sin(10°+theta)

Answers

Answered by sumaiyahhilme

3

Answer:

cos 60=1/2

Step-by-step explanation:

cos a cosb+sina sinb =cos (a-b)

Ur equation is in this form....so apply this to get Ur answer

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