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trigonometry ---------------------------------------------- ----------------------------------------------- prove that
(cotA+cosecA-1)/(cotA-cosecA+1)=cosecA+cotA ----->
(problem on trigonometry
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================Prove that (tanxsinx) / (tanx+sinx) = (tanx-sinx) / (tanx sinx) -----> (problem on trigonometry ) find exact value of tan[22½ °] or tan (pi / 8 ) -----> (problem on trigonometry ) conditional identity : If A+B+C=π, prove that: sinA+sinB+sinC = cot(A/2).cot(B/2) [sinA+sinB-sinC] -----> (problem on conditional identity (trigonometry) ) If A + B + C = π , show that cosA + cosB + cos C = 1 + 4 sin(A/2)sin(B/2)sin(C/2) explanation * * ================ graphs of trigonometric functions-----> (graphs of trigonometric functions ) --------------------------------------------------------------- Inverse trigonometric functions show that arctanx +arctany = arctan {(x+y)/(1-xy)} --------------inverse trigonometric functions trig. formulae |
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