1. Evaluate : cos 56° / sin 34°
2. Evaluate : tan 25° / cot 65°
3. Evaluate : (cos 65° sin 18° cos 58°) / (cos 72° sin 25° sin 32)
4. Prove : tan 35º tan 60° tan 55º tan 30º = 1
5. If sin A = cos 33°, find A
6. Find value of sec70 x sin20 - cos20 x cosec70
7. Find the value of each trigonometric ratio.
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Answer:
1) 1
2)1
3)1
4)1
5)A=57°
6)0
7) sin A=opp/hyp. CosA=adj/hyp, TanA =opp. /hyp
Cosec A =hyp/Opp, secA=hyp/adj. CotA=adj/Opp.
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