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Given: Right Triangle PQR , with acute angles P and R. Which statement is NOT true?Answer choices:A. sin=cos(90−) B. cos=sin(−90) C. cos=sinD. sin=cos

Sagot :

Solution

A

cos (90-R)= cos 90* cos R + sin 90* sin R= sin R (TRUE)

B. sin (R-90) =sin R* cos 90 -cosR* sin 90 = -cos R

C.

D

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