If Sec,0 - Tan0 is = 4. Then prove
cos0 =8/17
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Answer:
》secØ - tanØ = 4
Therefore, secØ + tanØ = 1/4
Add both eq
》2secØ = 4 + 1/4
》secØ = 17/8
Hence, cosØ = 8/17
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