Question

if qcosA= ✓q2- p2 proof that qsinq =p
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Answer 1

Answer:

squaring both the sides

(qcosA)^2 = q2 - p2

q2cos2A = q2 - p2

p2 = q2 - q2cos2A

p2 = q2 ( 1- cos2A)

p = ✓q2 sin2A

p = q sinA. proved