Express cosA in terms of cotA

Express x in terms of a,b and c. log x = 1/2 (log a + log b - log c) Please solve and explain how...

express secA in terms of cotA? can you pleas say how to solve this??

1-cosA+cosB-cos(A+B)/1+cosA-cosB-cos(A+B)=tan(A/2)ct(A/2)

express in terms of i 3/-104

Sina+cosa=root over cosA

prove that :cosA-sinA+1/cosA+sinA-1=cosecA+cotA

1-cosA+sinA DIVIDED BY 1+cosA+sinA

If cosA + sinA= root2 cosA Show that cosA - sinA= root2 sinA

Express the following in terms of the cosine of another angle between 0 degree and 180 Degree

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