SOLUTION: Use identities to find the indicated value for each angle measure.
sin θ = 7/25 , cos θ > 0
Find cos(2θ).
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-> SOLUTION: Use identities to find the indicated value for each angle measure.
sin θ = 7/25 , cos θ > 0
Find cos(2θ).
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Question 1043291: Use identities to find the indicated value for each angle measure.
sin θ = 7/25 , cos θ > 0
Find cos(2θ). Answer by ikleyn(52898) (Show Source):
You can put this solution on YOUR website! .
Use identities to find the indicated value for each angle measure.
sin θ = 7/25 , cos θ > 0
Find cos(2θ).
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First, notice that both sine and cosine are positive, so is in the QI.
Next, = = = = = .
Answer. = .
Again, notice that is positive, hence, the angle also lies in QI.
