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  1. If (a2+b2)SinA=a2-b2, find the value of tanA.

Santosh lamsal , 9 Years ago
Grade 9
anser 1 Answers
Lab Bhattacharjee

Last Activity: 9 Years ago

\text{HINT: use} \cos x=\pm\sqrt{1-\sin^2x} \ \ \text{to get } \cos A=\pm\dfrac{2ab}{a^2-b^2}

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