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| 1. |
Evaluate: sinAcosA-sinAcos(90-A)cosA/sec(90-A)-cosAsin(90-A)sinA/cosec(90-A) |
| Answer» Answer is 0SinAcosA - sinAcos^2A/secA - cosAsin^2A/cosecA= SinAcosA - sinAcos^3A - cosAsin^3A=SinAcosA(1- cos^2A - sin^2A)=SinAcosA(0)=0 | |