1)Prove (trigonometric identities)
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1+sinØ/cosØ
(1+sinØ)cosØ/cos²Ø
(1+sinø)cosø/(1-sin²ø)
(1+sinø)cosø/(1+sinø)(1-sinø)
cosø/1-sinø
1+cosø/sinø
(1+cosø)sinø/sin²ø
(1+cosø)sinø/(1-cos²ø)
(1+cosø)sinø/(1+cosø)(1-cosø)
sinø/1-cosø
secø+1/tanø
(secø+1)tanø/tan²ø
(secø+1)tanø/(secø²-1)
(secø+1)tanø/(secø+1)(secø-1)
tanø/secø+1
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