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CBSE Class 10 Answered

answer it immediately
Asked by pankajkumarsingh25 | 08 Feb, 2010, 01:36: PM
answered-by-expert Expert Answer

7sinA + 11cosA = 89

This equation is IMPOSSIBLE, because sinA or cos A can take a maximum value of 1, and that too not simultaneously.

Although some tricks to help solve the problem are,

sin4A+sin2A+cos2A+cos4A = sin2Acos2A(sin2A+cos2A) = sin2Acos2A

Given an equation line psinA + qcosA = r

Write, psinA = r-qcosA.

Square both sides, to get a quadratic equation in cos A.

Find cos A, then sinA

Please provide addition details and clarification, to give you complete solution.

Regards,

Team,

TopperLearning.

 

Answered by | 13 Feb, 2010, 10:24: PM

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