Question

find:

I) cos A
ii) cosec A
iii)
${tan}^{2} a - {sec}^{2} a$
iv) sin C
v) sec C
vi)
${cot}^{2} c \: - \frac{1}{sin {}^{2}c }$

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Answer 1

Answer:

1. cosA=3/5
2. cosecA=5/4
3. sinC=4/12=1/3
4. secC=12/8√2=3/2√2