Find ϴ in the equation sin(ϴ + 15) = cos(2ϴ) a. 50 b. 75 c. 25 d. 40

1 answer:

8 0

The answer is c. 25

sin(ϴ + 15) = cos(2ϴ)
sin(ϴ + 15) =sin(25 + 15) =sin(40) =0.64
cos(2ϴ)=cos(2x25)=cos(50)=0.64
 so ϴ=25

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