given 17 cos 0=15 ,find the value of tan 0+25 sec
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cos = 15/17
sec= 1/cos = 17/15
by Pythagoras theorem
H²= P²+B²
17² = P² + 15 ²
P² = 17² -15²
P² = 289-225
P² = 64
P= 8
tan = P/B = 8/15
tan +25sec = 8/15 + 25 × 17/15 = 8/15 + 85/3
= 8+ 425 /15 = 433/15 = 28.86
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