Can someone please help me?
Use identities to find the indicated value for each angle measure.
sin θ = 12/13, cos θ > 0
Find cos (2θ).
cos(2θ)
=cos²(θ)-sin²(θ)
=(1-sin²(θ))-sin²(θ)]
=1-2sin²(θ)
Can you do the rest?
Use identities to find the indicated value for each angle measure.
sin θ = 12/13, cos θ > 0
Find cos (2θ).
=cos²(θ)-sin²(θ)
=(1-sin²(θ))-sin²(θ)]
=1-2sin²(θ)
Can you do the rest?