How to use use 1/2r^2sinθ, in a sum
I.e what to take as θ?
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The sine of the angle = the length of the opposite side. the length of the hypotenuse.The cosine of the angle = the length of the adjacent side. the length of the hypotenuse.The tangent of the angle = the length of the opposite side. the length of the adjacent side.
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The sine of the angle = the length of the opposite side. the length of the hypotenuse. the cosin of the angle = the length of the adjacent side. the length of the hypotenuse. the targent of the angle = the length of the opposite side. the length of the adjacent side.
hope it is helpful...
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