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If tan A = n tan B and sin A = m sin B, then the value of $cos^{2}A$ is1). $\frac{m^{2} -1}{n^{2} +1}$2). $\frac{m^{2} +1}{n^{2} -1}$3). $\frac{m^{2} +1}{n^{2} +1}$4). $\frac{m^{2} -1}{n^{2} -1}$ |
Answer» I have read it somewhere $\FRAC{m^{2} -1}{n^{2} -1}$ is CORRECT |
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