18.4 Solving expressions using 45-45-90 special right triangles
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Solving expressions using 45-45-90 special right triangles

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Notes:
sin45=12 \sin 45^\circ = {1 \over \sqrt 2}
cos45=12 \cos 45^\circ = {1 \over \sqrt 2}
tan45=11=1 \tan 45^\circ = {1 \over 1} = 1


  • 2.
    If θ=45 \theta = 45^\circ , find the exact value of following expressions.
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Solving expressions using 45-45-90 special right triangles

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