Asked by Sandy
sin(270 degrees - theta) = -cos(theta)
Answers
Answered by
MathMate
Prove the following identity:
sin(270 degrees - theta) = -cos(theta)
sin(270 degrees - theta)
= sin(270°)cos(θ) - cos(270°)sin(θ)
=(-1)cos(θ) - (0)sin(θ)
= -cos(θ)
Please post the complete question. It was not clear whether it was an equation to be solved or the proof of an identity required.
sin(270 degrees - theta) = -cos(theta)
sin(270 degrees - theta)
= sin(270°)cos(θ) - cos(270°)sin(θ)
=(-1)cos(θ) - (0)sin(θ)
= -cos(θ)
Please post the complete question. It was not clear whether it was an equation to be solved or the proof of an identity required.
Answered by
Sandy
*verify that it is an identity
Answered by
MathMate
That's what I thought. Thank you for posting a complete question.
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