Trust is an important factor in Wireless Sensor Network (WSN) that enables the sensor node to cooperate each other for their application. It makes the nodes in the wireless sensor networks to cope with uncertainty caused by the other nodes in the network. Managing the trust in the wireless sensor network is highly challenging task due to resource constraints and network dynamics. To have a secure communication, it is necessary that a node in the network should analyze the trust level of the communicating node in the network. In WSN, an untrustworthy can cause damage to the sensed data in terms of reliability, quality and integrity. In this work, we analyze various trust computation methodologies and components for finding trust. In addition to that, we also highlight the trust metrics, and terminologies in WSN.