Determine Whether the Statement Is True or False

question 201

True/False

Determine whether the statement is true or false.
-sin 390° = sin 120° cos 270° + cos 120° sin 270°

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Definitions:

Zone of Proximal Development

A concept in educational theory referring to the difference between what a learner can do without help and what they can achieve with guidance and encouragement from a skilled partner.

Apprenticeship in Thinking

A concept in developmental psychology referring to the way children learn cognitive skills through engaged participation in structured activities with skilled adults or peers.

Developmental Theory

A framework for understanding how and why people change over the course of their lives, encompassing various aspects of growth including psychological, cognitive, and social development.

Hypothesis

A proposed explanation made on the basis of limited evidence as a starting point for further investigation, often testable by experimentation or further observation.