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1 (i) cosP= PR/PQ
sinQ= PR/PQ
tanP= QR/PR
tanQ= PR/QR
2. sinX= a/c
cosZ=a/c
tanX=a/b
sinZ= b/c
3. sin40°= MN/LN
cos50= MN/LN
tan40= MN/LM
tan50= LM/MN
4. (i) sina= QS/PS
cosa= PQ/PS
tana= QS/PQ
sinQ= PQ/PR
cosQ= QR/PR
tanQ= PQ/QR
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